diff --git a/lambda-events/Cargo.toml b/lambda-events/Cargo.toml
index 481f77ba..cd2d86f2 100644
--- a/lambda-events/Cargo.toml
+++ b/lambda-events/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "aws_lambda_events"
-version = "0.16.1"
+version = "0.17.0"
 rust-version = "1.81.0"
 description = "AWS Lambda event definitions"
 authors = [
@@ -125,5 +125,7 @@ streams = []
 documentdb = []
 eventbridge = ["chrono", "serde_with"]
 
+catch-all-fields = []
+
 [package.metadata.docs.rs]
-all-features = true
\ No newline at end of file
+all-features = true
diff --git a/lambda-events/src/event/activemq/mod.rs b/lambda-events/src/event/activemq/mod.rs
index 89cfda1c..d9283bea 100644
--- a/lambda-events/src/event/activemq/mod.rs
+++ b/lambda-events/src/event/activemq/mod.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 use std::collections::HashMap;
 
 use crate::custom_serde::deserialize_lambda_map;
@@ -11,6 +13,13 @@ pub struct ActiveMqEvent {
     #[serde(default)]
     pub event_source_arn: Option<String>,
     pub messages: Vec<ActiveMqMessage>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -41,6 +50,13 @@ pub struct ActiveMqMessage {
     #[serde(deserialize_with = "deserialize_lambda_map")]
     #[serde(default)]
     pub properties: HashMap<String, String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -48,6 +64,13 @@ pub struct ActiveMqMessage {
 pub struct ActiveMqDestination {
     #[serde(default)]
     pub physical_name: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/alb/mod.rs b/lambda-events/src/event/alb/mod.rs
index 3b4ce9d5..55e427e2 100644
--- a/lambda-events/src/event/alb/mod.rs
+++ b/lambda-events/src/event/alb/mod.rs
@@ -7,6 +7,8 @@ use crate::{
 use http::{HeaderMap, Method};
 use query_map::QueryMap;
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 /// `AlbTargetGroupRequest` contains data originating from the ALB Lambda target group integration
 #[derive(Clone, Debug, Default, Deserialize, PartialEq, Serialize)]
@@ -30,6 +32,13 @@ pub struct AlbTargetGroupRequest {
     #[serde(default, deserialize_with = "deserialize_nullish_boolean")]
     pub is_base64_encoded: bool,
     pub body: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `AlbTargetGroupRequestContext` contains the information to identify the load balancer invoking the lambda
@@ -37,6 +46,13 @@ pub struct AlbTargetGroupRequest {
 #[serde(rename_all = "camelCase")]
 pub struct AlbTargetGroupRequestContext {
     pub elb: ElbContext,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ElbContext` contains the information to identify the ARN invoking the lambda
@@ -46,6 +62,13 @@ pub struct ElbContext {
     /// nolint: stylecheck
     #[serde(default)]
     pub target_group_arn: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `AlbTargetGroupResponse` configures the response to be returned by the ALB Lambda target group for the request
@@ -65,6 +88,13 @@ pub struct AlbTargetGroupResponse {
     pub body: Option<Body>,
     #[serde(default, deserialize_with = "deserialize_nullish_boolean")]
     pub is_base64_encoded: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/apigw/mod.rs b/lambda-events/src/event/apigw/mod.rs
index e0aa1e8c..c7a6175b 100644
--- a/lambda-events/src/event/apigw/mod.rs
+++ b/lambda-events/src/event/apigw/mod.rs
@@ -47,6 +47,13 @@ pub struct ApiGatewayProxyRequest {
     pub body: Option<String>,
     #[serde(default, deserialize_with = "deserialize_nullish_boolean")]
     pub is_base64_encoded: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayProxyResponse` configures the response to be returned by API Gateway for the request
@@ -64,6 +71,13 @@ pub struct ApiGatewayProxyResponse {
     pub body: Option<Body>,
     #[serde(default, deserialize_with = "deserialize_nullish_boolean")]
     pub is_base64_encoded: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayProxyRequestContext` contains the information to identify the AWS account and resources invoking the
@@ -110,6 +124,13 @@ pub struct ApiGatewayProxyRequestContext {
     #[serde(default)]
     #[serde(rename = "apiId")]
     pub apiid: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayV2httpRequest` contains data coming from the new HTTP API Gateway
@@ -160,6 +181,13 @@ pub struct ApiGatewayV2httpRequest {
     pub body: Option<String>,
     #[serde(default)]
     pub is_base64_encoded: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayV2httpRequestContext` contains the information to identify the AWS account and resources invoking the Lambda function.
@@ -192,6 +220,13 @@ pub struct ApiGatewayV2httpRequestContext {
     pub http: ApiGatewayV2httpRequestContextHttpDescription,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub authentication: Option<ApiGatewayV2httpRequestContextAuthentication>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayRequestAuthorizer` contains authorizer information for the request context.
@@ -209,6 +244,13 @@ pub struct ApiGatewayRequestAuthorizer {
     pub fields: HashMap<String, Value>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub iam: Option<ApiGatewayRequestAuthorizerIamDescription>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayRequestAuthorizerJwtDescription` contains JWT authorizer information for the request context.
@@ -220,6 +262,13 @@ pub struct ApiGatewayRequestAuthorizerJwtDescription {
     pub claims: HashMap<String, String>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub scopes: Option<Vec<String>>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayRequestAuthorizerIamDescription` contains IAM information for the request context.
@@ -240,6 +289,13 @@ pub struct ApiGatewayRequestAuthorizerIamDescription {
     pub user_arn: Option<String>,
     #[serde(default)]
     pub user_id: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayRequestAuthorizerCognitoIdentity` contains Cognito identity information for the request context.
@@ -251,6 +307,13 @@ pub struct ApiGatewayRequestAuthorizerCognitoIdentity {
     pub identity_id: Option<String>,
     #[serde(default)]
     pub identity_pool_id: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayV2httpRequestContextHttpDescription` contains HTTP information for the request context.
@@ -267,6 +330,13 @@ pub struct ApiGatewayV2httpRequestContextHttpDescription {
     pub source_ip: Option<String>,
     #[serde(default)]
     pub user_agent: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayV2httpResponse` configures the response to be returned by API Gateway V2 for the request
@@ -285,6 +355,13 @@ pub struct ApiGatewayV2httpResponse {
     #[serde(default, deserialize_with = "deserialize_nullish_boolean")]
     pub is_base64_encoded: bool,
     pub cookies: Vec<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayRequestIdentity` contains identity information for the request caller.
@@ -318,6 +395,13 @@ pub struct ApiGatewayRequestIdentity {
     pub user_agent: Option<String>,
     #[serde(default)]
     pub user: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayWebsocketProxyRequest` contains data coming from the API Gateway proxy
@@ -357,6 +441,13 @@ pub struct ApiGatewayWebsocketProxyRequest {
     pub body: Option<String>,
     #[serde(default, deserialize_with = "deserialize_nullish_boolean")]
     pub is_base64_encoded: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayWebsocketProxyRequestContext` contains the information to identify
@@ -421,6 +512,13 @@ pub struct ApiGatewayWebsocketProxyRequestContext {
     pub disconnect_status_code: Option<i64>,
     #[serde(default)]
     pub disconnect_reason: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayCustomAuthorizerRequestTypeRequestIdentity` contains identity information for the request caller including certificate information if using mTLS.
@@ -435,6 +533,13 @@ pub struct ApiGatewayCustomAuthorizerRequestTypeRequestIdentity {
     pub source_ip: Option<String>,
     #[serde(default)]
     pub client_cert: Option<ApiGatewayCustomAuthorizerRequestTypeRequestIdentityClientCert>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayCustomAuthorizerRequestTypeRequestIdentityClientCert` contains certificate information for the request caller if using mTLS.
@@ -452,6 +557,13 @@ pub struct ApiGatewayCustomAuthorizerRequestTypeRequestIdentityClientCert {
     #[serde(rename = "subjectDN")]
     pub subject_dn: Option<String>,
     pub validity: ApiGatewayCustomAuthorizerRequestTypeRequestIdentityClientCertValidity,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayCustomAuthorizerRequestTypeRequestIdentityClientCertValidity` contains certificate validity information for the request caller if using mTLS.
@@ -462,6 +574,13 @@ pub struct ApiGatewayCustomAuthorizerRequestTypeRequestIdentityClientCertValidit
     pub not_after: Option<String>,
     #[serde(default)]
     pub not_before: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayV2httpRequestContextAuthentication` contains authentication context information for the request caller including client certificate information if using mTLS.
@@ -470,6 +589,13 @@ pub struct ApiGatewayCustomAuthorizerRequestTypeRequestIdentityClientCertValidit
 pub struct ApiGatewayV2httpRequestContextAuthentication {
     #[serde(default)]
     pub client_cert: Option<ApiGatewayV2httpRequestContextAuthenticationClientCert>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayV2httpRequestContextAuthenticationClientCert` contains client certificate information for the request caller if using mTLS.
@@ -487,6 +613,13 @@ pub struct ApiGatewayV2httpRequestContextAuthenticationClientCert {
     #[serde(rename = "subjectDN")]
     pub subject_dn: Option<String>,
     pub validity: ApiGatewayV2httpRequestContextAuthenticationClientCertValidity,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayV2httpRequestContextAuthenticationClientCertValidity` contains client certificate validity information for the request caller if using mTLS.
@@ -497,6 +630,13 @@ pub struct ApiGatewayV2httpRequestContextAuthenticationClientCertValidity {
     pub not_after: Option<String>,
     #[serde(default)]
     pub not_before: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -520,6 +660,13 @@ pub struct ApiGatewayV2CustomAuthorizerV1RequestTypeRequestContext {
     #[serde(default)]
     #[serde(rename = "apiId")]
     pub apiid: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -555,6 +702,13 @@ pub struct ApiGatewayV2CustomAuthorizerV1Request {
     #[serde(default)]
     pub stage_variables: HashMap<String, String>,
     pub request_context: ApiGatewayV2CustomAuthorizerV1RequestTypeRequestContext,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -590,6 +744,13 @@ pub struct ApiGatewayV2CustomAuthorizerV2Request {
     #[serde(deserialize_with = "deserialize_lambda_map")]
     #[serde(default)]
     pub stage_variables: HashMap<String, String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayCustomAuthorizerContext` represents the expected format of an API Gateway custom authorizer response.
@@ -602,6 +763,13 @@ pub struct ApiGatewayCustomAuthorizerContext {
     pub num_key: Option<i64>,
     #[serde(default, deserialize_with = "deserialize_nullish_boolean")]
     pub bool_key: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayCustomAuthorizerRequestTypeRequestContext` represents the expected format of an API Gateway custom authorizer response.
@@ -630,6 +798,13 @@ pub struct ApiGatewayCustomAuthorizerRequestTypeRequestContext {
     #[serde(default)]
     #[serde(rename = "apiId")]
     pub apiid: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayCustomAuthorizerRequest` contains data coming in to a custom API Gateway authorizer function.
@@ -643,6 +818,13 @@ pub struct ApiGatewayCustomAuthorizerRequest {
     /// nolint: stylecheck
     #[serde(default)]
     pub method_arn: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayCustomAuthorizerRequestTypeRequest` contains data coming in to a custom API Gateway authorizer function.
@@ -680,6 +862,13 @@ pub struct ApiGatewayCustomAuthorizerRequestTypeRequest {
     #[serde(default)]
     pub stage_variables: HashMap<String, String>,
     pub request_context: ApiGatewayCustomAuthorizerRequestTypeRequestContext,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayCustomAuthorizerResponse` represents the expected format of an API Gateway authorization response.
@@ -696,6 +885,13 @@ where
     #[serde(bound = "", default)]
     pub context: T1,
     pub usage_identifier_key: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayV2CustomAuthorizerSimpleResponse` represents the simple format of an API Gateway V2 authorization response.
@@ -709,6 +905,13 @@ where
     pub is_authorized: bool,
     #[serde(bound = "", default)]
     pub context: T1,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -723,6 +926,13 @@ where
     pub policy_document: ApiGatewayCustomAuthorizerPolicy,
     #[serde(bound = "", default)]
     pub context: T1,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ApiGatewayCustomAuthorizerPolicy` represents an IAM policy
@@ -732,6 +942,13 @@ pub struct ApiGatewayCustomAuthorizerPolicy {
     #[serde(default)]
     pub version: Option<String>,
     pub statement: Vec<IamPolicyStatement>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 fn default_http_method() -> Method {
@@ -876,6 +1093,24 @@ mod test {
         assert!(output.contains(r#""headername":"headerValue2""#));
     }
 
+    #[test]
+    #[cfg(all(feature = "apigw", feature = "catch-all-fields"))]
+    fn example_apigw_request_catch_all() {
+        use serde_json::json;
+
+        let data = include_bytes!("../../fixtures/example-apigw-request-catch-all.json");
+        let parsed: ApiGatewayProxyRequest = serde_json::from_slice(data).unwrap();
+        let output: String = serde_json::to_string(&parsed).unwrap();
+        let reparsed: ApiGatewayProxyRequest = serde_json::from_slice(output.as_bytes()).unwrap();
+        assert_eq!(parsed, reparsed);
+
+        assert_eq!(parsed.other.get("otherField"), Some(&json!("foobar")));
+        assert_eq!(
+            parsed.request_context.identity.other.get("otherField"),
+            Some(&json!(2345))
+        );
+    }
+
     #[test]
     #[cfg(feature = "apigw")]
     fn example_apigw_restapi_openapi_request() {
diff --git a/lambda-events/src/event/appsync/mod.rs b/lambda-events/src/event/appsync/mod.rs
index 4aa62e5b..ed68915e 100644
--- a/lambda-events/src/event/appsync/mod.rs
+++ b/lambda-events/src/event/appsync/mod.rs
@@ -17,6 +17,13 @@ where
     pub operation: AppSyncOperation,
     #[serde(bound = "")]
     pub payload: Option<T1>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `AppSyncIamIdentity` contains information about the caller authed via IAM.
@@ -38,6 +45,13 @@ pub struct AppSyncIamIdentity {
     pub username: Option<String>,
     #[serde(default)]
     pub user_arn: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `AppSyncCognitoIdentity` contains information about the caller authed via Cognito.
@@ -61,6 +75,13 @@ where
     pub source_ip: Vec<String>,
     #[serde(default)]
     pub default_auth_strategy: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 pub type AppSyncOperation = String;
@@ -72,6 +93,13 @@ pub struct AppSyncLambdaAuthorizerRequest {
     #[serde(default)]
     pub authorization_token: Option<String>,
     pub request_context: AppSyncLambdaAuthorizerRequestContext,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `AppSyncLambdaAuthorizerRequestContext` contains the parameters of the AppSync invocation which triggered
@@ -98,6 +126,13 @@ where
     #[serde(default)]
     #[serde(bound = "")]
     pub variables: HashMap<String, T1>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `AppSyncLambdaAuthorizerResponse` represents the expected format of an authorization response to AppSync.
@@ -115,6 +150,13 @@ where
     pub resolver_context: HashMap<String, T1>,
     pub denied_fields: Option<Vec<String>>,
     pub ttl_override: Option<i64>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `AppSyncDirectResolverEvent` represents the default payload structure sent by AWS AppSync
@@ -147,6 +189,13 @@ where
     pub prev: Option<AppSyncPrevResult>,
     #[serde(bound = "")]
     pub stash: TStash,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `AppSyncRequest` contains request-related metadata for a resolver invocation,
@@ -160,6 +209,13 @@ pub struct AppSyncRequest {
     pub headers: HashMap<String, Option<String>>,
     #[serde(default)]
     pub domain_name: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `AppSyncInfo` contains metadata about the current GraphQL field being resolved.
@@ -177,6 +233,13 @@ where
     pub field_name: String,
     #[serde(bound = "")]
     pub variables: T,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `AppSyncPrevResult` contains the result of the previous step in a pipeline resolver.
@@ -187,6 +250,13 @@ where
 {
     #[serde(bound = "")]
     pub result: T,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `AppSyncIdentity` represents the identity of the caller as determined by the
@@ -210,6 +280,13 @@ where
     pub claims: T,
     pub issuer: String,
     pub sub: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `AppSyncIdentityLambda` represents identity information when using AWS Lambda
@@ -221,6 +298,13 @@ where
 {
     #[serde(bound = "")]
     pub resolver_context: T,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/autoscaling/mod.rs b/lambda-events/src/event/autoscaling/mod.rs
index 601e8774..1aeea5a2 100644
--- a/lambda-events/src/event/autoscaling/mod.rs
+++ b/lambda-events/src/event/autoscaling/mod.rs
@@ -41,6 +41,13 @@ where
     #[serde(default)]
     #[serde(bound = "")]
     pub detail: HashMap<String, T1>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/bedrock_agent_runtime/mod.rs b/lambda-events/src/event/bedrock_agent_runtime/mod.rs
index c1425b85..e7b4e69c 100644
--- a/lambda-events/src/event/bedrock_agent_runtime/mod.rs
+++ b/lambda-events/src/event/bedrock_agent_runtime/mod.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 use std::collections::HashMap;
 
 /// The Event sent to Lambda from Agents for Amazon Bedrock.
@@ -29,6 +31,13 @@ pub struct AgentEvent {
     pub session_attributes: HashMap<String, String>,
     /// Contains prompt attributes and their values.
     pub prompt_session_attributes: HashMap<String, String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -36,6 +45,13 @@ pub struct AgentEvent {
 pub struct RequestBody {
     /// Contains the request body and its properties
     pub content: HashMap<String, Content>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -43,6 +59,13 @@ pub struct RequestBody {
 pub struct Content {
     /// The content of the request body
     pub properties: Vec<Property>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -54,6 +77,13 @@ pub struct Property {
     pub r#type: String,
     /// The value of the parameter
     pub value: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -65,6 +95,13 @@ pub struct Parameter {
     pub r#type: String,
     /// The value of the parameter
     pub value: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -78,6 +115,13 @@ pub struct Agent {
     pub alias: String,
     /// The version of the agent.
     pub version: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/chime_bot/mod.rs b/lambda-events/src/event/chime_bot/mod.rs
index 6581ed2c..d4bcd5f6 100644
--- a/lambda-events/src/event/chime_bot/mod.rs
+++ b/lambda-events/src/event/chime_bot/mod.rs
@@ -1,5 +1,7 @@
 use chrono::{DateTime, Utc};
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -17,6 +19,13 @@ pub struct ChimeBotEvent {
     pub event_timestamp: DateTime<Utc>,
     #[serde(rename = "Message")]
     pub message: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -28,6 +37,13 @@ pub struct ChimeBotEventSender {
     #[serde(default)]
     #[serde(rename = "SenderIdType")]
     pub sender_id_type: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -39,6 +55,13 @@ pub struct ChimeBotEventDiscussion {
     #[serde(default)]
     #[serde(rename = "DiscussionType")]
     pub discussion_type: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -50,4 +73,11 @@ pub struct ChimeBotEventInboundHttpsEndpoint {
     #[serde(default)]
     #[serde(rename = "Url")]
     pub url: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/clientvpn/mod.rs b/lambda-events/src/event/clientvpn/mod.rs
index 163abe72..e99d7c8c 100644
--- a/lambda-events/src/event/clientvpn/mod.rs
+++ b/lambda-events/src/event/clientvpn/mod.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -29,6 +31,13 @@ pub struct ClientVpnConnectionHandlerRequest {
     #[serde(default)]
     #[serde(rename = "schema-version")]
     pub schema_version: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -43,6 +52,13 @@ pub struct ClientVpnConnectionHandlerResponse {
     #[serde(default)]
     #[serde(rename = "schema-version")]
     pub schema_version: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/cloudformation/mod.rs b/lambda-events/src/event/cloudformation/mod.rs
index 44156b97..4134c144 100644
--- a/lambda-events/src/event/cloudformation/mod.rs
+++ b/lambda-events/src/event/cloudformation/mod.rs
@@ -35,6 +35,13 @@ where
     pub logical_resource_id: String,
     #[serde(bound = "")]
     pub resource_properties: P2,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Deserialize, PartialEq, Serialize)]
@@ -57,6 +64,13 @@ where
     pub resource_properties: P2,
     #[serde(bound = "")]
     pub old_resource_properties: P1,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Deserialize, PartialEq, Serialize)]
@@ -76,6 +90,13 @@ where
     pub physical_resource_id: String,
     #[serde(bound = "")]
     pub resource_properties: P2,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Deserialize, PartialEq, Serialize)]
@@ -89,6 +110,13 @@ pub struct CloudFormationCustomResourceResponse {
     pub logical_resource_id: String,
     pub no_echo: bool,
     pub data: HashMap<String, String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Deserialize, PartialEq, Serialize)]
diff --git a/lambda-events/src/event/cloudformation/provider.rs b/lambda-events/src/event/cloudformation/provider.rs
index df5ba80a..786d6075 100644
--- a/lambda-events/src/event/cloudformation/provider.rs
+++ b/lambda-events/src/event/cloudformation/provider.rs
@@ -30,6 +30,7 @@ where
 {
     #[serde(flatten, bound = "")]
     pub common: CommonRequestParams<P2>,
+    // No `other` catch-all here; any additional fields will be caught in `common.other` instead
 }
 
 #[derive(Clone, Debug, Deserialize, PartialEq, Serialize)]
@@ -46,6 +47,7 @@ where
 
     #[serde(flatten, bound = "")]
     pub common: CommonRequestParams<P2>,
+    // No `other` catch-all here; any additional fields will be caught in `common.other` instead
 }
 
 #[derive(Clone, Debug, Deserialize, PartialEq, Serialize)]
@@ -58,6 +60,7 @@ where
 
     #[serde(flatten, bound = "")]
     pub common: CommonRequestParams<P2>,
+    // No `other` catch-all here; any additional fields will be caught in `common.other` instead
 }
 
 #[derive(Clone, Debug, Deserialize, PartialEq, Serialize)]
@@ -72,6 +75,13 @@ where
     pub resource_type: String,
     pub request_id: String,
     pub stack_id: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Deserialize, PartialEq, Serialize, Default)]
@@ -84,6 +94,13 @@ where
     #[serde(bound = "")]
     pub data: D,
     pub no_echo: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/cloudwatch_alarms/mod.rs b/lambda-events/src/event/cloudwatch_alarms/mod.rs
index 720236c2..c3efebe3 100644
--- a/lambda-events/src/event/cloudwatch_alarms/mod.rs
+++ b/lambda-events/src/event/cloudwatch_alarms/mod.rs
@@ -33,6 +33,13 @@ where
 
     #[serde(default, bound = "")]
     pub alarm_data: CloudWatchAlarmData<C, R>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CloudWatchMetricAlarm` is the structure of an event triggered by CloudWatch metric alarms.
@@ -59,6 +66,13 @@ where
     pub previous_state: Option<CloudWatchAlarmState<R>>,
     #[serde(bound = "")]
     pub configuration: C,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -76,6 +90,13 @@ where
     pub timestamp: DateTime<Utc>,
     pub actions_suppressed_by: Option<String>,
     pub actions_suppressed_reason: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -85,6 +106,13 @@ pub struct CloudWatchMetricAlarmConfiguration {
     pub description: Option<String>,
     #[serde(default)]
     pub metrics: Vec<CloudWatchMetricDefinition>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -94,6 +122,13 @@ pub struct CloudWatchMetricDefinition {
     #[serde(default)]
     pub return_data: bool,
     pub metric_stat: CloudWatchMetricStatDefinition,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -105,6 +140,13 @@ pub struct CloudWatchMetricStatDefinition {
     pub stat: Option<String>,
     pub period: u16,
     pub metric: CloudWatchMetricStatMetricDefinition,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -114,6 +156,13 @@ pub struct CloudWatchMetricStatMetricDefinition {
     pub namespace: Option<String>,
     pub name: String,
     pub dimensions: HashMap<String, String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -123,6 +172,13 @@ pub struct CloudWatchCompositeAlarmConfiguration {
     pub actions_suppressor: String,
     pub actions_suppressor_wait_period: u16,
     pub actions_suppressor_extension_period: u16,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -169,6 +225,13 @@ pub struct CloudWatchAlarmStateReasonDataMetric {
     pub threshold: f64,
     #[serde(default)]
     pub evaluated_datapoints: Vec<CloudWatchAlarmStateEvaluatedDatapoint>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, PartialEq, Serialize)]
@@ -181,6 +244,13 @@ pub struct CloudWatchAlarmStateEvaluatedDatapoint {
     pub value: Option<f64>,
     #[serde(default)]
     pub threshold: Option<f64>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -188,6 +258,13 @@ pub struct CloudWatchAlarmStateEvaluatedDatapoint {
 pub struct ClodWatchAlarmStateReasonDataComposite {
     #[serde(default)]
     pub triggering_alarms: Vec<CloudWatchAlarmStateTriggeringAlarm>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -195,6 +272,13 @@ pub struct ClodWatchAlarmStateReasonDataComposite {
 pub struct CloudWatchAlarmStateTriggeringAlarm {
     pub arn: String,
     pub state: CloudWatchAlarmStateTriggeringAlarmState,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -203,6 +287,13 @@ pub struct CloudWatchAlarmStateTriggeringAlarmState {
     pub timestamp: DateTime<Utc>,
     #[serde(default)]
     pub value: CloudWatchAlarmStateValue,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 impl<'de> Deserialize<'de> for CloudWatchAlarmStateReasonData {
diff --git a/lambda-events/src/event/cloudwatch_events/cloudtrail.rs b/lambda-events/src/event/cloudwatch_events/cloudtrail.rs
index fc332306..08b7500a 100644
--- a/lambda-events/src/event/cloudwatch_events/cloudtrail.rs
+++ b/lambda-events/src/event/cloudwatch_events/cloudtrail.rs
@@ -23,6 +23,13 @@ pub struct AWSAPICall<I = Value, O = Value> {
     #[serde(rename = "eventID")]
     pub event_id: String,
     pub event_type: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -33,6 +40,13 @@ pub struct SessionIssuer {
     pub principal_id: String,
     pub arn: String,
     pub account_id: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -40,6 +54,13 @@ pub struct SessionIssuer {
 pub struct WebIdFederationData {
     pub federated_provider: Option<String>,
     pub attributes: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -47,6 +68,13 @@ pub struct WebIdFederationData {
 pub struct Attributes {
     pub mfa_authenticated: String,
     pub creation_date: DateTime<Utc>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -57,6 +85,13 @@ pub struct SessionContext {
     pub attributes: Attributes,
     pub source_identity: Option<String>,
     pub ec2_role_delivery: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -64,6 +99,13 @@ pub struct SessionContext {
 pub struct OnBehalfOf {
     pub user_id: String,
     pub identity_store_arn: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 // https://docs.aws.amazon.com/awscloudtrail/latest/userguide/cloudtrail-event-reference-user-identity.html
@@ -79,6 +121,13 @@ pub struct UserIdentity {
     pub session_context: Option<SessionContext>,
     pub user_name: Option<String>,
     pub on_behalf_of: Option<OnBehalfOf>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/cloudwatch_events/codedeploy.rs b/lambda-events/src/event/cloudwatch_events/codedeploy.rs
index 1bd44297..b52528ca 100644
--- a/lambda-events/src/event/cloudwatch_events/codedeploy.rs
+++ b/lambda-events/src/event/cloudwatch_events/codedeploy.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -9,6 +11,13 @@ pub struct StateChangeNotification {
     pub deployment_id: String,
     pub state: String,
     pub deployment_group: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -21,6 +30,13 @@ pub struct DeploymentStateChangeNotification {
     pub deployment_id: String,
     pub instance_group_id: String,
     pub deployment_group: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -31,4 +47,11 @@ pub struct InstanceStateChangeNotification {
     pub state: String,
     #[serde(rename = "execution-id")]
     pub execution_id: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/cloudwatch_events/codepipeline.rs b/lambda-events/src/event/cloudwatch_events/codepipeline.rs
index ce5fa47c..e99798e7 100644
--- a/lambda-events/src/event/cloudwatch_events/codepipeline.rs
+++ b/lambda-events/src/event/cloudwatch_events/codepipeline.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -8,6 +10,13 @@ pub struct PipelineExecutionStateChange {
     pub state: String,
     #[serde(rename = "execution-id")]
     pub execution_id: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -19,6 +28,13 @@ pub struct StageExecutionStateChange {
     pub execution_id: String,
     pub stage: String,
     pub state: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -34,6 +50,13 @@ pub struct ActionExecutionStateChange {
     pub region: String,
     #[serde(rename = "type")]
     pub type_field: ActionExecutionStateChangeType,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -43,4 +66,11 @@ pub struct ActionExecutionStateChangeType {
     pub category: String,
     pub provider: String,
     pub version: i64,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/cloudwatch_events/ec2.rs b/lambda-events/src/event/cloudwatch_events/ec2.rs
index c8eb7834..c77fab4f 100644
--- a/lambda-events/src/event/cloudwatch_events/ec2.rs
+++ b/lambda-events/src/event/cloudwatch_events/ec2.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -6,4 +8,11 @@ pub struct InstanceStateChange {
     #[serde(rename = "instance-id")]
     pub instance_id: String,
     pub state: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/cloudwatch_events/emr.rs b/lambda-events/src/event/cloudwatch_events/emr.rs
index 87fb8085..4aed4818 100644
--- a/lambda-events/src/event/cloudwatch_events/emr.rs
+++ b/lambda-events/src/event/cloudwatch_events/emr.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -8,6 +10,13 @@ pub struct AutoScalingPolicyStateChange {
     pub state: String,
     pub message: String,
     pub scaling_resource_type: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -19,6 +28,13 @@ pub struct ClusterStateChange {
     pub cluster_id: String,
     pub state: String,
     pub message: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -34,6 +50,13 @@ pub struct InstanceGroupStateChange {
     pub running_instance_count: String,
     pub state: String,
     pub message: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -46,4 +69,11 @@ pub struct StepStatusChange {
     pub cluster_id: String,
     pub state: String,
     pub message: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/cloudwatch_events/gamelift.rs b/lambda-events/src/event/cloudwatch_events/gamelift.rs
index fb5c50a7..009f1056 100644
--- a/lambda-events/src/event/cloudwatch_events/gamelift.rs
+++ b/lambda-events/src/event/cloudwatch_events/gamelift.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 use crate::custom_serde::deserialize_nullish_boolean;
 
@@ -9,6 +11,13 @@ pub struct MatchmakingSearching {
     pub estimated_wait_millis: String,
     pub r#type: String,
     pub game_session_info: GameSessionInfo,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -17,6 +26,13 @@ pub struct Ticket {
     pub ticket_id: String,
     pub start_time: String,
     pub players: Vec<Player>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -27,12 +43,26 @@ pub struct Player {
     #[serde(default, deserialize_with = "deserialize_nullish_boolean")]
     pub accepted: bool,
     pub player_session_id: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct GameSessionInfo {
     pub players: Vec<Player>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -45,6 +75,13 @@ pub struct PotentialMatchCreated {
     pub r#type: String,
     pub game_session_info: GameSessionInfo,
     pub match_id: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -53,6 +90,13 @@ pub struct RuleEvaluationMetric {
     pub rule_name: String,
     pub passed_count: i64,
     pub failed_count: i64,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -62,6 +106,13 @@ pub struct AcceptMatch {
     pub r#type: String,
     pub game_session_info: GameSessionInfo,
     pub match_id: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -72,6 +123,13 @@ pub struct AcceptMatchCompleted {
     pub r#type: String,
     pub game_session_info: GameSessionInfo,
     pub match_id: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -81,6 +139,13 @@ pub struct MatchmakingSucceeded {
     pub r#type: String,
     pub game_session_info: GameSessionInfo,
     pub match_id: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -92,6 +157,13 @@ pub struct MatchmakingTimedOut {
     pub r#type: String,
     pub message: String,
     pub game_session_info: GameSessionInfo,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -103,6 +175,13 @@ pub struct MatchmakingCancelled {
     pub r#type: String,
     pub message: String,
     pub game_session_info: GameSessionInfo,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -115,4 +194,11 @@ pub struct MatchmakingFailed {
     pub message: String,
     pub game_session_info: GameSessionInfo,
     pub match_id: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/cloudwatch_events/glue.rs b/lambda-events/src/event/cloudwatch_events/glue.rs
index 08f05929..21669098 100644
--- a/lambda-events/src/event/cloudwatch_events/glue.rs
+++ b/lambda-events/src/event/cloudwatch_events/glue.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -8,6 +10,13 @@ pub struct JobRunStateChange {
     pub state: String,
     pub job_run_id: String,
     pub message: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -18,6 +27,13 @@ pub struct CrawlerStarted {
     pub start_time: String,
     pub state: String,
     pub message: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -38,6 +54,13 @@ pub struct CrawlerSucceeded {
     pub state: String,
     pub partitions_created: String,
     pub cloud_watch_log_link: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -49,6 +72,13 @@ pub struct CrawlerFailed {
     pub cloud_watch_log_link: String,
     pub state: String,
     pub message: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, PartialEq, Serialize)]
@@ -61,6 +91,13 @@ pub struct JobRunStatus {
     pub job_run_id: String,
     pub message: String,
     pub started_on: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, PartialEq, Serialize)]
@@ -68,6 +105,13 @@ pub struct JobRunStatus {
 pub struct NotificationCondition {
     #[serde(rename = "NotifyDelayAfter")]
     pub notify_delay_after: f64,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -77,6 +121,13 @@ pub struct DataCatalogTableStateChange {
     pub changed_partitions: Vec<String>,
     pub type_of_change: String,
     pub table_name: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -85,4 +136,11 @@ pub struct DataCatalogDatabaseStateChange {
     pub database_name: String,
     pub type_of_change: String,
     pub changed_tables: Vec<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/cloudwatch_events/health.rs b/lambda-events/src/event/cloudwatch_events/health.rs
index 2a6a82e3..c6d8cca1 100644
--- a/lambda-events/src/event/cloudwatch_events/health.rs
+++ b/lambda-events/src/event/cloudwatch_events/health.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 use std::collections::HashMap;
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -12,6 +14,13 @@ pub struct Event {
     pub end_time: String,
     pub event_description: Vec<EventDescription>,
     pub affected_entities: Option<Vec<Entity>>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -19,6 +28,13 @@ pub struct Event {
 pub struct EventDescription {
     pub language: String,
     pub latest_description: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -26,4 +42,11 @@ pub struct EventDescription {
 pub struct Entity {
     pub entity_value: String,
     pub tags: HashMap<String, String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/cloudwatch_events/kms.rs b/lambda-events/src/event/cloudwatch_events/kms.rs
index 74a76e70..2a0041de 100644
--- a/lambda-events/src/event/cloudwatch_events/kms.rs
+++ b/lambda-events/src/event/cloudwatch_events/kms.rs
@@ -1,8 +1,17 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct CMKEvent {
     #[serde(rename = "key-id")]
     pub key_id: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/cloudwatch_events/macie.rs b/lambda-events/src/event/cloudwatch_events/macie.rs
index 37d18d7a..a652b8b2 100644
--- a/lambda-events/src/event/cloudwatch_events/macie.rs
+++ b/lambda-events/src/event/cloudwatch_events/macie.rs
@@ -1,4 +1,7 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+#[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+use serde_json::Value;
 use std::collections::HashMap;
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -18,6 +21,13 @@ pub struct Alert<T> {
     pub created_at: String,
     pub actor: String,
     pub summary: T,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 pub type BucketScanAlert = Alert<BucketScanSummary>;
@@ -35,6 +45,13 @@ pub struct Trigger {
     pub created_at: String,
     pub description: String,
     pub risk: i64,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -57,6 +74,13 @@ pub struct BucketScanSummary {
     #[serde(rename = "Events")]
     pub events: HashMap<String, ActionInfo>,
     pub recipient_account_id: HashMap<String, i64>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -68,6 +92,13 @@ pub struct Ip {
     pub n34_205_153_2: i64,
     #[serde(rename = "72.21.196.70")]
     pub n72_21_196_70: i64,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -76,6 +107,13 @@ pub struct TimeRange {
     pub count: i64,
     pub start: String,
     pub end: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -83,6 +121,13 @@ pub struct TimeRange {
 pub struct Location {
     #[serde(rename = "us-east-1")]
     pub us_east_1: i64,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -92,6 +137,13 @@ pub struct ActionInfo {
     #[serde(rename = "ISP")]
     pub isp: HashMap<String, i64>,
     pub error_code: Option<HashMap<String, i64>>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -109,6 +161,13 @@ pub struct BucketWritableSummary {
     pub event_count: i64,
     #[serde(rename = "Timestamps")]
     pub timestamps: HashMap<String, i64>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -116,6 +175,13 @@ pub struct BucketWritableSummary {
 pub struct Bucket {
     #[serde(rename = "secret-bucket-name")]
     pub secret_bucket_name: i64,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -123,6 +189,13 @@ pub struct Bucket {
 pub struct Acl {
     #[serde(rename = "secret-bucket-name")]
     pub secret_bucket_name: Vec<SecretBucketName>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -132,6 +205,13 @@ pub struct SecretBucketName {
     pub owner: Owner,
     #[serde(rename = "Grants")]
     pub grants: Vec<Grant>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -141,6 +221,13 @@ pub struct Owner {
     pub display_name: String,
     #[serde(rename = "ID")]
     pub id: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -150,6 +237,13 @@ pub struct Grant {
     pub grantee: Grantee,
     #[serde(rename = "Permission")]
     pub permission: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -158,6 +252,13 @@ pub struct Grantee {
     pub r#type: String,
     #[serde(rename = "URI")]
     pub uri: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -179,6 +280,13 @@ pub struct BucketContainsHighRiskObjectSummary {
     pub owner: HashMap<String, i64>,
     #[serde(rename = "Timestamps")]
     pub timestamps: HashMap<String, i64>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, PartialEq, Serialize)]
@@ -197,6 +305,13 @@ pub struct AlertUpdated {
     pub created_at: String,
     pub actor: String,
     pub trigger: UpdatedTrigger,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, PartialEq, Serialize)]
@@ -205,6 +320,13 @@ pub struct UpdatedTrigger {
     #[serde(rename = "alert-type")]
     pub alert_type: String,
     pub features: HashMap<String, FeatureInfo>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, PartialEq, Serialize)]
@@ -218,4 +340,11 @@ pub struct FeatureInfo {
     #[serde(rename = "excession_times")]
     pub excession_times: Vec<String>,
     pub risk: i64,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/cloudwatch_events/mod.rs b/lambda-events/src/event/cloudwatch_events/mod.rs
index 2af343de..fd680c01 100644
--- a/lambda-events/src/event/cloudwatch_events/mod.rs
+++ b/lambda-events/src/event/cloudwatch_events/mod.rs
@@ -46,4 +46,11 @@ where
     pub resources: Vec<String>,
     #[serde(bound = "")]
     pub detail: Option<T1>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/cloudwatch_events/opsworks.rs b/lambda-events/src/event/cloudwatch_events/opsworks.rs
index d1c192e5..30818648 100644
--- a/lambda-events/src/event/cloudwatch_events/opsworks.rs
+++ b/lambda-events/src/event/cloudwatch_events/opsworks.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -15,6 +17,13 @@ pub struct InstanceStateChange {
     #[serde(rename = "ec2-instance-id")]
     pub ec2_instance_id: String,
     pub status: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -26,6 +35,13 @@ pub struct CommandStateChange {
     pub instance_id: String,
     pub r#type: String,
     pub status: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -40,6 +56,13 @@ pub struct DeploymentStateChange {
     pub deployment_id: String,
     pub command: String,
     pub status: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -51,4 +74,11 @@ pub struct Alert {
     pub instance_id: String,
     pub r#type: String,
     pub message: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/cloudwatch_events/signin.rs b/lambda-events/src/event/cloudwatch_events/signin.rs
index 1cd73e6e..2eb1ea5e 100644
--- a/lambda-events/src/event/cloudwatch_events/signin.rs
+++ b/lambda-events/src/event/cloudwatch_events/signin.rs
@@ -19,6 +19,13 @@ pub struct SignIn {
     #[serde(rename = "eventID")]
     pub event_id: String,
     pub event_type: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -28,6 +35,13 @@ pub struct UserIdentity {
     pub principal_id: String,
     pub arn: String,
     pub account_id: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -35,6 +49,13 @@ pub struct UserIdentity {
 pub struct ResponseElements {
     #[serde(rename = "ConsoleLogin")]
     pub console_login: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -46,4 +67,11 @@ pub struct AdditionalEventData {
     pub mobile_version: String,
     #[serde(rename = "MFAUsed")]
     pub mfaused: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/cloudwatch_events/sms.rs b/lambda-events/src/event/cloudwatch_events/sms.rs
index 7d161822..6447887a 100644
--- a/lambda-events/src/event/cloudwatch_events/sms.rs
+++ b/lambda-events/src/event/cloudwatch_events/sms.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -11,4 +13,11 @@ pub struct JobStateChange {
     #[serde(rename = "ami-id")]
     pub ami_id: Option<String>,
     pub version: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/cloudwatch_events/ssm.rs b/lambda-events/src/event/cloudwatch_events/ssm.rs
index fa6ffc3b..53a48e10 100644
--- a/lambda-events/src/event/cloudwatch_events/ssm.rs
+++ b/lambda-events/src/event/cloudwatch_events/ssm.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 use std::collections::HashMap;
 
 #[derive(Clone, Debug, Default, Deserialize, PartialEq, Serialize)]
@@ -22,6 +24,13 @@ pub struct EC2AutomationStepStatusChange {
     pub step_name: String,
     #[serde(rename = "Action")]
     pub action: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, PartialEq, Serialize)]
@@ -43,6 +52,13 @@ pub struct EC2AutomationExecutionStatusChange {
     pub time: f64,
     #[serde(rename = "ExecutedBy")]
     pub executed_by: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -51,6 +67,13 @@ pub struct StateChange {
     pub state: String,
     pub at_time: String,
     pub next_transition_time: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -69,6 +92,13 @@ pub struct ConfigurationComplianceStateChange {
     #[serde(rename = "patch-baseline-id")]
     pub patch_baseline_id: Option<String>,
     pub serverity: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -79,6 +109,13 @@ pub struct MaintenanceWindowTargetRegistration {
     #[serde(rename = "window-id")]
     pub window_id: String,
     pub status: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -93,6 +130,13 @@ pub struct MaintenanceWindowExecutionStateChange {
     #[serde(rename = "window-execution-id")]
     pub window_execution_id: String,
     pub status: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -109,6 +153,13 @@ pub struct MaintenanceWindowTaskExecutionStateChange {
     #[serde(rename = "window-execution-id")]
     pub window_execution_id: String,
     pub status: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -129,6 +180,13 @@ pub struct MaintenanceWindowTaskTargetInvocationStateChange {
     pub status: String,
     #[serde(rename = "owner-information")]
     pub owner_information: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -137,6 +195,13 @@ pub struct MaintenanceWindowStateChange {
     #[serde(rename = "window-id")]
     pub window_id: String,
     pub status: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -146,6 +211,13 @@ pub struct ParameterStoreStateChange {
     pub name: String,
     pub r#type: String,
     pub description: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -161,6 +233,13 @@ pub struct EC2CommandStatusChange {
     #[serde(rename = "requested-date-time")]
     pub requested_date_time: String,
     pub status: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -175,6 +254,13 @@ pub struct EC2CommandInvocationStatusChange {
     #[serde(rename = "requested-date-time")]
     pub requested_date_time: String,
     pub status: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -204,6 +290,13 @@ pub struct EC2StateManagerAssociationStateChange {
     pub schedule_expression: String,
     #[serde(rename = "association-cwe-version")]
     pub association_cwe_version: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -235,4 +328,11 @@ pub struct EC2StateManagerInstanceAssociationStateChange {
     pub output_url: String,
     #[serde(rename = "instance-association-cwe-version")]
     pub instance_association_cwe_version: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/cloudwatch_events/tag.rs b/lambda-events/src/event/cloudwatch_events/tag.rs
index d5bc9681..08fbe24c 100644
--- a/lambda-events/src/event/cloudwatch_events/tag.rs
+++ b/lambda-events/src/event/cloudwatch_events/tag.rs
@@ -1,3 +1,5 @@
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 use std::collections::HashMap;
 
 use serde::{Deserialize, Serialize};
@@ -12,4 +14,11 @@ pub struct TagChangeOnResource {
     pub resource_type: String,
     pub version: i64,
     pub tags: HashMap<String, String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/cloudwatch_events/trustedadvisor.rs b/lambda-events/src/event/cloudwatch_events/trustedadvisor.rs
index 6a7e25d3..19f2aba0 100644
--- a/lambda-events/src/event/cloudwatch_events/trustedadvisor.rs
+++ b/lambda-events/src/event/cloudwatch_events/trustedadvisor.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 use std::collections::HashMap;
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -12,4 +14,11 @@ pub struct CheckItemRefreshNotification {
     #[serde(rename = "resource_id")]
     pub resource_id: String,
     pub uuid: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/cloudwatch_logs/mod.rs b/lambda-events/src/event/cloudwatch_logs/mod.rs
index 0c9ad4a8..1a485a06 100644
--- a/lambda-events/src/event/cloudwatch_logs/mod.rs
+++ b/lambda-events/src/event/cloudwatch_logs/mod.rs
@@ -3,6 +3,10 @@ use serde::{
     ser::{Error as SeError, SerializeStruct},
     Deserialize, Deserializer, Serialize, Serializer,
 };
+#[cfg(feature = "catch-all-fields")]
+#[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+use serde_json::Value;
+
 use std::{fmt, io::BufReader};
 
 /// `LogsEvent` represents the raw event sent by CloudWatch
@@ -11,6 +15,13 @@ pub struct LogsEvent {
     /// `aws_logs` is gzipped and base64 encoded, it needs a custom deserializer
     #[serde(rename = "awslogs")]
     pub aws_logs: AwsLogs,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `AwsLogs` is an unmarshaled, ungzipped, CloudWatch logs event
@@ -36,6 +47,13 @@ pub struct LogData {
     pub message_type: String,
     /// Entries in the log batch
     pub log_events: Vec<LogEntry>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `LogEntry` represents a log entry from cloudwatch logs
@@ -47,6 +65,13 @@ pub struct LogEntry {
     pub timestamp: i64,
     /// Message published in the application log
     pub message: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 impl<'de> Deserialize<'de> for AwsLogs {
diff --git a/lambda-events/src/event/code_commit/mod.rs b/lambda-events/src/event/code_commit/mod.rs
index 7d5edfaa..81d85ef8 100644
--- a/lambda-events/src/event/code_commit/mod.rs
+++ b/lambda-events/src/event/code_commit/mod.rs
@@ -1,5 +1,7 @@
 use chrono::{DateTime, Utc};
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 use crate::custom_serde::deserialize_nullish_boolean;
 
@@ -9,6 +11,13 @@ use crate::custom_serde::deserialize_nullish_boolean;
 pub struct CodeCommitEvent {
     #[serde(rename = "Records")]
     pub records: Vec<CodeCommitRecord>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 pub type CodeCommitEventTime = DateTime<Utc>;
@@ -44,6 +53,13 @@ pub struct CodeCommitRecord {
     pub aws_region: Option<String>,
     pub event_total_parts: u64,
     pub custom_data: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodeCommitCodeCommit` represents a CodeCommit object in a record
@@ -51,6 +67,16 @@ pub struct CodeCommitRecord {
 #[serde(rename_all = "camelCase")]
 pub struct CodeCommitCodeCommit {
     pub references: Vec<CodeCommitReference>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodeCommitReference` represents a Reference object in a CodeCommit object
@@ -63,6 +89,13 @@ pub struct CodeCommitReference {
     pub ref_: Option<String>,
     #[serde(default, deserialize_with = "deserialize_nullish_boolean")]
     pub created: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/codebuild/mod.rs b/lambda-events/src/event/codebuild/mod.rs
index ad7775d2..ac0a50de 100644
--- a/lambda-events/src/event/codebuild/mod.rs
+++ b/lambda-events/src/event/codebuild/mod.rs
@@ -44,6 +44,13 @@ pub struct CodeBuildEvent {
     /// Detail contains information specific to a build state-change or
     /// build phase-change event.
     pub detail: CodeBuildEventDetail,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodeBuildEventDetail` represents the all details related to the code build event
@@ -84,6 +91,13 @@ pub struct CodeBuildEventDetail {
     #[serde(default)]
     #[serde(with = "codebuild_time::optional_time")]
     pub completed_phase_end: Option<CodeBuildTime>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodeBuildEventAdditionalInformation` represents additional information to the code build event
@@ -109,6 +123,13 @@ pub struct CodeBuildEventAdditionalInformation {
     pub source_version: Option<String>,
     pub logs: CodeBuildLogs,
     pub phases: Vec<CodeBuildPhase>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodeBuildArtifact` represents the artifact provided to build
@@ -123,6 +144,13 @@ pub struct CodeBuildArtifact {
     pub sha256_sum: Option<String>,
     #[serde(default)]
     pub location: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodeBuildEnvironment` represents the environment for a build
@@ -140,6 +168,13 @@ pub struct CodeBuildEnvironment {
     pub type_: Option<String>,
     #[serde(rename = "environment-variables")]
     pub environment_variables: Vec<CodeBuildEnvironmentVariable>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodeBuildEnvironmentVariable` encapsulate environment variables for the code build
@@ -155,6 +190,13 @@ pub struct CodeBuildEnvironmentVariable {
     /// Value is the value of the environment variable.
     #[serde(default)]
     pub value: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodeBuildSource` represent the code source will be build
@@ -165,6 +207,13 @@ pub struct CodeBuildSource {
     pub location: Option<String>,
     #[serde(default)]
     pub type_: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodeBuildLogs` gives the log details of a code build
@@ -180,6 +229,13 @@ pub struct CodeBuildLogs {
     #[serde(default)]
     #[serde(rename = "deep-link")]
     pub deep_link: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodeBuildPhase` represents the phase of a build and its details
@@ -206,6 +262,13 @@ where
     pub phase_type: CodeBuildPhaseType,
     #[serde(rename = "phase-status")]
     pub phase_status: Option<CodeBuildPhaseStatus>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 pub type CodeBuildTime = DateTime<Utc>;
diff --git a/lambda-events/src/event/codedeploy/mod.rs b/lambda-events/src/event/codedeploy/mod.rs
index b0a25c5b..ec6657b6 100644
--- a/lambda-events/src/event/codedeploy/mod.rs
+++ b/lambda-events/src/event/codedeploy/mod.rs
@@ -1,5 +1,7 @@
 use chrono::{DateTime, Utc};
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 pub type CodeDeployDeploymentState = String;
 
@@ -38,6 +40,13 @@ pub struct CodeDeployEvent {
     pub resources: Vec<String>,
     /// Detail contains information specific to a deployment event.
     pub detail: CodeDeployEventDetail,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -63,6 +72,13 @@ pub struct CodeDeployEventDetail {
     /// DeploymentGroup is the name of the deployment group.
     #[serde(default)]
     pub deployment_group: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Deserialize, Serialize, Eq, PartialEq)]
@@ -70,6 +86,13 @@ pub struct CodeDeployEventDetail {
 pub struct CodeDeployLifecycleEvent {
     pub deployment_id: String,
     pub lifecycle_event_hook_execution_id: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/codepipeline_cloudwatch/mod.rs b/lambda-events/src/event/codepipeline_cloudwatch/mod.rs
index 6e394c17..1863e8aa 100644
--- a/lambda-events/src/event/codepipeline_cloudwatch/mod.rs
+++ b/lambda-events/src/event/codepipeline_cloudwatch/mod.rs
@@ -1,5 +1,7 @@
 use chrono::{DateTime, Utc};
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 pub type CodePipelineStageState = String;
 
@@ -42,6 +44,13 @@ pub struct CodePipelineCloudWatchEvent {
     pub resources: Vec<String>,
     /// Detail contains information specific to a deployment event.
     pub detail: CodePipelineEventDetail,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -62,6 +71,13 @@ pub struct CodePipelineEventDetail {
     #[serde(default)]
     pub region: Option<String>,
     pub type_: Option<CodePipelineEventDetailType>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -75,6 +91,13 @@ pub struct CodePipelineEventDetailType {
     pub provider: Option<String>,
     /// From published EventBridge schema registry this is always int64 not string as documented
     pub version: i64,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/codepipeline_job/mod.rs b/lambda-events/src/event/codepipeline_job/mod.rs
index 888e77b7..befb4c4c 100644
--- a/lambda-events/src/event/codepipeline_job/mod.rs
+++ b/lambda-events/src/event/codepipeline_job/mod.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 /// `CodePipelineJobEvent` contains data from an event sent from AWS CodePipeline
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -6,6 +8,13 @@ use serde::{Deserialize, Serialize};
 pub struct CodePipelineJobEvent {
     #[serde(rename = "CodePipeline.job")]
     pub code_pipeline_job: CodePipelineJob,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodePipelineJob` represents a job from an AWS CodePipeline event
@@ -17,6 +26,13 @@ pub struct CodePipelineJob {
     #[serde(default)]
     pub account_id: Option<String>,
     pub data: CodePipelineData,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodePipelineData` represents a job from an AWS CodePipeline event
@@ -30,6 +46,13 @@ pub struct CodePipelineData {
     pub artifact_credentials: CodePipelineArtifactCredentials,
     #[serde(default)]
     pub continuation_token: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodePipelineActionConfiguration` represents an Action Configuration
@@ -37,6 +60,13 @@ pub struct CodePipelineData {
 #[serde(rename_all = "camelCase")]
 pub struct CodePipelineActionConfiguration {
     pub configuration: CodePipelineConfiguration,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodePipelineConfiguration` represents a configuration for an Action Configuration
@@ -49,6 +79,13 @@ pub struct CodePipelineConfiguration {
     #[serde(default)]
     #[serde(rename = "UserParameters")]
     pub user_parameters: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodePipelineInputArtifact` represents an input artifact
@@ -59,6 +96,13 @@ pub struct CodePipelineInputArtifact {
     pub revision: Option<String>,
     #[serde(default)]
     pub name: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodePipelineInputLocation` represents a input location
@@ -69,6 +113,13 @@ pub struct CodePipelineInputLocation {
     #[serde(default)]
     #[serde(rename = "type")]
     pub location_type: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodePipelineS3Location` represents an s3 input location
@@ -79,6 +130,13 @@ pub struct CodePipelineS3Location {
     pub bucket_name: Option<String>,
     #[serde(default)]
     pub object_key: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodePipelineOutputArtifact` represents an output artifact
@@ -89,6 +147,13 @@ pub struct CodePipelineOutputArtifact {
     pub revision: Option<String>,
     #[serde(default)]
     pub name: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodePipelineOutputLocation` represents a output location
@@ -99,6 +164,13 @@ pub struct CodePipelineOutputLocation {
     #[serde(default)]
     #[serde(rename = "type")]
     pub location_type: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CodePipelineArtifactCredentials` represents CodePipeline artifact credentials
@@ -111,6 +183,13 @@ pub struct CodePipelineArtifactCredentials {
     pub session_token: Option<String>,
     #[serde(default)]
     pub access_key_id: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/cognito/mod.rs b/lambda-events/src/event/cognito/mod.rs
index a0ebd8d9..315bc2ff 100644
--- a/lambda-events/src/event/cognito/mod.rs
+++ b/lambda-events/src/event/cognito/mod.rs
@@ -22,6 +22,13 @@ pub struct CognitoEvent {
     #[serde(default)]
     pub region: Option<String>,
     pub version: i64,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoDatasetRecord` represents a record from an AWS Cognito Sync event
@@ -34,6 +41,13 @@ pub struct CognitoDatasetRecord {
     pub old_value: Option<String>,
     #[serde(default)]
     pub op: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsPreSignup` is sent by AWS Cognito User Pools when a user attempts to register
@@ -46,6 +60,13 @@ pub struct CognitoEventUserPoolsPreSignup {
     pub cognito_event_user_pools_header: CognitoEventUserPoolsHeader<CognitoEventUserPoolsPreSignupTriggerSource>,
     pub request: CognitoEventUserPoolsPreSignupRequest,
     pub response: CognitoEventUserPoolsPreSignupResponse,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize, Default)]
@@ -70,6 +91,13 @@ pub struct CognitoEventUserPoolsPreAuthentication {
         CognitoEventUserPoolsHeader<CognitoEventUserPoolsPreAuthenticationTriggerSource>,
     pub request: CognitoEventUserPoolsPreAuthenticationRequest,
     pub response: CognitoEventUserPoolsPreAuthenticationResponse,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize, Default)]
@@ -95,6 +123,13 @@ where
     pub request: CognitoEventUserPoolsPostConfirmationRequest,
     #[serde(bound = "")]
     pub response: T,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize, Default)]
@@ -116,6 +151,13 @@ pub struct CognitoEventUserPoolsPreTokenGen {
     pub cognito_event_user_pools_header: CognitoEventUserPoolsHeader<CognitoEventUserPoolsPreTokenGenTriggerSource>,
     pub request: CognitoEventUserPoolsPreTokenGenRequest,
     pub response: CognitoEventUserPoolsPreTokenGenResponse,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize, Default)]
@@ -144,6 +186,13 @@ pub struct CognitoEventUserPoolsPostAuthentication {
         CognitoEventUserPoolsHeader<CognitoEventUserPoolsPostAuthenticationTriggerSource>,
     pub request: CognitoEventUserPoolsPostAuthenticationRequest,
     pub response: CognitoEventUserPoolsPostAuthenticationResponse,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize, Default)]
@@ -165,6 +214,13 @@ pub struct CognitoEventUserPoolsMigrateUser {
     pub cognito_event_user_pools_migrate_user_request: CognitoEventUserPoolsMigrateUserRequest,
     #[serde(rename = "response")]
     pub cognito_event_user_pools_migrate_user_response: CognitoEventUserPoolsMigrateUserResponse,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize, Default)]
@@ -185,6 +241,13 @@ pub struct CognitoEventUserPoolsCallerContext {
     pub awssdk_version: Option<String>,
     #[serde(default)]
     pub client_id: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsHeader` contains common data from events sent by AWS Cognito User Pools
@@ -202,6 +265,9 @@ pub struct CognitoEventUserPoolsHeader<T> {
     pub caller_context: CognitoEventUserPoolsCallerContext,
     #[serde(default)]
     pub user_name: Option<String>,
+    // no `other` catch-all, because this struct is itself #[serde(flatten)]-ed
+    // into a different struct that contains an `other` catch-all, so any
+    // additional fields will be caught there instead
 }
 
 /// `CognitoEventUserPoolsPreSignupRequest` contains the request portion of a PreSignup event
@@ -217,6 +283,13 @@ pub struct CognitoEventUserPoolsPreSignupRequest {
     #[serde(deserialize_with = "deserialize_lambda_map")]
     #[serde(default)]
     pub client_metadata: HashMap<String, String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsPreSignupResponse` contains the response portion of a PreSignup event
@@ -226,6 +299,13 @@ pub struct CognitoEventUserPoolsPreSignupResponse {
     pub auto_confirm_user: bool,
     pub auto_verify_email: bool,
     pub auto_verify_phone: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsPreAuthenticationRequest` contains the request portion of a PreAuthentication event
@@ -238,11 +318,26 @@ pub struct CognitoEventUserPoolsPreAuthenticationRequest {
     #[serde(deserialize_with = "deserialize_lambda_map")]
     #[serde(default)]
     pub validation_data: HashMap<String, String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsPreAuthenticationResponse` contains the response portion of a PreAuthentication event
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
-pub struct CognitoEventUserPoolsPreAuthenticationResponse {}
+pub struct CognitoEventUserPoolsPreAuthenticationResponse {
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
+}
 /// `CognitoEventUserPoolsPostConfirmationRequest` contains the request portion of a PostConfirmation event
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -253,11 +348,26 @@ pub struct CognitoEventUserPoolsPostConfirmationRequest {
     #[serde(deserialize_with = "deserialize_lambda_map")]
     #[serde(default)]
     pub client_metadata: HashMap<String, String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsPostConfirmationResponse` contains the response portion of a PostConfirmation event
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
-pub struct CognitoEventUserPoolsPostConfirmationResponse {}
+pub struct CognitoEventUserPoolsPostConfirmationResponse {
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
+}
 
 /// `CognitoEventUserPoolsPreTokenGenRequest` contains request portion of PreTokenGen event
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -270,6 +380,13 @@ pub struct CognitoEventUserPoolsPreTokenGenRequest {
     #[serde(deserialize_with = "deserialize_lambda_map")]
     #[serde(default)]
     pub client_metadata: HashMap<String, String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsPreTokenGenResponse` contains the response portion of  a PreTokenGen event
@@ -277,6 +394,13 @@ pub struct CognitoEventUserPoolsPreTokenGenRequest {
 #[serde(rename_all = "camelCase")]
 pub struct CognitoEventUserPoolsPreTokenGenResponse {
     pub claims_override_details: Option<ClaimsOverrideDetails>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsPreTokenGenV2` is sent by AWS Cognito User Pools when a user attempts to retrieve
@@ -289,6 +413,13 @@ pub struct CognitoEventUserPoolsPreTokenGenV2 {
     pub cognito_event_user_pools_header: CognitoEventUserPoolsHeader<CognitoEventUserPoolsPreTokenGenTriggerSource>,
     pub request: CognitoEventUserPoolsPreTokenGenRequestV2,
     pub response: CognitoEventUserPoolsPreTokenGenResponseV2,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsPreTokenGenRequestV2` contains request portion of PreTokenGenV2 event
@@ -303,12 +434,26 @@ pub struct CognitoEventUserPoolsPreTokenGenRequestV2 {
     #[serde(default)]
     pub client_metadata: HashMap<String, String>,
     pub scopes: Vec<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct CognitoEventUserPoolsPreTokenGenResponseV2 {
     pub claims_and_scope_override_details: Option<ClaimsAndScopeOverrideDetailsV2>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ClaimsAndScopeOverrideDetailsV2` allows lambda to add, suppress or override claims in the token
@@ -318,6 +463,13 @@ pub struct ClaimsAndScopeOverrideDetailsV2 {
     pub group_override_details: GroupConfiguration,
     pub id_token_generation: Option<CognitoIdTokenGenerationV2>,
     pub access_token_generation: Option<CognitoAccessTokenGenerationV2>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoIdTokenGenerationV2` allows lambda to customize the ID Token before generation
@@ -326,6 +478,13 @@ pub struct ClaimsAndScopeOverrideDetailsV2 {
 pub struct CognitoIdTokenGenerationV2 {
     pub claims_to_add_or_override: HashMap<String, String>,
     pub claims_to_suppress: Vec<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoAccessTokenGenerationV2` allows lambda to customize the Access Token before generation
@@ -336,6 +495,13 @@ pub struct CognitoAccessTokenGenerationV2 {
     pub claims_to_suppress: Vec<String>,
     pub scopes_to_add: Vec<String>,
     pub scopes_to_suppress: Vec<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsPostAuthenticationRequest` contains the request portion of a PostAuthentication event
@@ -349,11 +515,26 @@ pub struct CognitoEventUserPoolsPostAuthenticationRequest {
     #[serde(deserialize_with = "deserialize_lambda_map")]
     #[serde(default)]
     pub client_metadata: HashMap<String, String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsPostAuthenticationResponse` contains the response portion of a PostAuthentication event
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
-pub struct CognitoEventUserPoolsPostAuthenticationResponse {}
+pub struct CognitoEventUserPoolsPostAuthenticationResponse {
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
+}
 /// `CognitoEventUserPoolsMigrateUserRequest` contains the request portion of a MigrateUser event
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -366,6 +547,13 @@ pub struct CognitoEventUserPoolsMigrateUserRequest {
     #[serde(deserialize_with = "deserialize_lambda_map")]
     #[serde(default)]
     pub client_metadata: HashMap<String, String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsMigrateUserResponse` contains the response portion of a MigrateUser event
@@ -383,6 +571,13 @@ pub struct CognitoEventUserPoolsMigrateUserResponse {
     pub desired_delivery_mediums: Option<Vec<String>>,
     #[serde(default, deserialize_with = "deserialize_nullish_boolean")]
     pub force_alias_creation: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ClaimsOverrideDetails` allows lambda to add, suppress or override claims in the token
@@ -394,6 +589,13 @@ pub struct ClaimsOverrideDetails {
     #[serde(default)]
     pub claims_to_add_or_override: HashMap<String, String>,
     pub claims_to_suppress: Vec<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `GroupConfiguration` allows lambda to override groups, roles and set a preferred role
@@ -403,6 +605,13 @@ pub struct GroupConfiguration {
     pub groups_to_override: Vec<String>,
     pub iam_roles_to_override: Vec<String>,
     pub preferred_role: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsChallengeResult` represents a challenge that is presented to the user in the authentication
@@ -415,6 +624,13 @@ pub struct CognitoEventUserPoolsChallengeResult {
     pub challenge_result: bool,
     #[serde(default)]
     pub challenge_metadata: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsDefineAuthChallengeRequest` defines auth challenge request parameters
@@ -430,6 +646,13 @@ pub struct CognitoEventUserPoolsDefineAuthChallengeRequest {
     pub client_metadata: HashMap<String, String>,
     #[serde(default)]
     pub user_not_found: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsDefineAuthChallengeResponse` defines auth challenge response parameters
@@ -442,6 +665,13 @@ pub struct CognitoEventUserPoolsDefineAuthChallengeResponse {
     pub issue_tokens: bool,
     #[serde(default, deserialize_with = "deserialize_nullish_boolean")]
     pub fail_authentication: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsDefineAuthChallenge` sent by AWS Cognito User Pools to initiate custom authentication flow
@@ -454,6 +684,13 @@ pub struct CognitoEventUserPoolsDefineAuthChallenge {
         CognitoEventUserPoolsHeader<CognitoEventUserPoolsDefineAuthChallengeTriggerSource>,
     pub request: CognitoEventUserPoolsDefineAuthChallengeRequest,
     pub response: CognitoEventUserPoolsDefineAuthChallengeResponse,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize, Default)]
@@ -478,6 +715,13 @@ pub struct CognitoEventUserPoolsCreateAuthChallengeRequest {
     pub client_metadata: HashMap<String, String>,
     #[serde(default)]
     pub user_not_found: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsCreateAuthChallengeResponse` defines create auth challenge response parameters
@@ -492,6 +736,13 @@ pub struct CognitoEventUserPoolsCreateAuthChallengeResponse {
     pub private_challenge_parameters: HashMap<String, String>,
     #[serde(default)]
     pub challenge_metadata: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsCreateAuthChallenge` sent by AWS Cognito User Pools to create a challenge to present to the user
@@ -504,6 +755,13 @@ pub struct CognitoEventUserPoolsCreateAuthChallenge {
         CognitoEventUserPoolsHeader<CognitoEventUserPoolsCreateAuthChallengeTriggerSource>,
     pub request: CognitoEventUserPoolsCreateAuthChallengeRequest,
     pub response: CognitoEventUserPoolsCreateAuthChallengeResponse,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize, Default)]
@@ -534,6 +792,13 @@ where
     pub client_metadata: HashMap<String, String>,
     #[serde(default)]
     pub user_not_found: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsVerifyAuthChallengeResponse` defines verify auth challenge response parameters
@@ -542,6 +807,13 @@ where
 pub struct CognitoEventUserPoolsVerifyAuthChallengeResponse {
     #[serde(default, deserialize_with = "deserialize_nullish_boolean")]
     pub answer_correct: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsVerifyAuthChallenge` sent by AWS Cognito User Pools to verify if the response from the end user
@@ -555,6 +827,13 @@ pub struct CognitoEventUserPoolsVerifyAuthChallenge {
         CognitoEventUserPoolsHeader<CognitoEventUserPoolsVerifyAuthChallengeTriggerSource>,
     pub request: CognitoEventUserPoolsVerifyAuthChallengeRequest,
     pub response: CognitoEventUserPoolsVerifyAuthChallengeResponse,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize, Default)]
@@ -574,6 +853,13 @@ pub struct CognitoEventUserPoolsCustomMessage {
     pub cognito_event_user_pools_header: CognitoEventUserPoolsHeader<CognitoEventUserPoolsCustomMessageTriggerSource>,
     pub request: CognitoEventUserPoolsCustomMessageRequest,
     pub response: CognitoEventUserPoolsCustomMessageResponse,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize, Default)]
@@ -614,6 +900,13 @@ where
     #[serde(deserialize_with = "deserialize_lambda_map")]
     #[serde(default)]
     pub client_metadata: HashMap<String, String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `CognitoEventUserPoolsCustomMessageResponse` contains the response portion of a CustomMessage event
@@ -626,6 +919,13 @@ pub struct CognitoEventUserPoolsCustomMessageResponse {
     pub email_message: Option<String>,
     #[serde(default)]
     pub email_subject: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
@@ -855,7 +1155,8 @@ mod test {
 
         assert!(parsed.request.user_not_found);
 
-        let output: String = serde_json::to_string(&parsed).unwrap();
+        let output: String = serde_json::to_string_pretty(&parsed).unwrap();
+        println!("output is: {output}");
         let reparsed: CognitoEventUserPoolsVerifyAuthChallenge = serde_json::from_slice(output.as_bytes()).unwrap();
         assert_eq!(parsed, reparsed);
     }
diff --git a/lambda-events/src/event/config/mod.rs b/lambda-events/src/event/config/mod.rs
index 7c06e13b..fd2631a6 100644
--- a/lambda-events/src/event/config/mod.rs
+++ b/lambda-events/src/event/config/mod.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 /// `ConfigEvent` contains data from an event sent from AWS Config
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -34,6 +36,13 @@ pub struct ConfigEvent {
     pub rule_parameters: Option<String>,
     #[serde(default)]
     pub version: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/connect/mod.rs b/lambda-events/src/event/connect/mod.rs
index 04f26eb5..c6bdb47b 100644
--- a/lambda-events/src/event/connect/mod.rs
+++ b/lambda-events/src/event/connect/mod.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 use std::collections::HashMap;
 
 use crate::custom_serde::deserialize_lambda_map;
@@ -13,6 +15,13 @@ pub struct ConnectEvent {
     #[serde(default)]
     #[serde(rename = "Name")]
     pub name: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ConnectDetails` holds the details of a Connect event
@@ -26,6 +35,13 @@ pub struct ConnectDetails {
     #[serde(default)]
     #[serde(rename = "Parameters")]
     pub parameters: HashMap<String, String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ConnectContactData` holds all of the contact information for the user that invoked the Connect event.
@@ -62,6 +78,13 @@ pub struct ConnectContactData {
     #[serde(default)]
     #[serde(rename = "InstanceARN")]
     pub instance_arn: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ConnectEndpoint` represents routing information.
@@ -74,6 +97,13 @@ pub struct ConnectEndpoint {
     #[serde(default)]
     #[serde(rename = "Type")]
     pub type_: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ConnectQueue` represents a queue object.
@@ -86,6 +116,13 @@ pub struct ConnectQueue {
     #[serde(default)]
     #[serde(rename = "ARN")]
     pub arn: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 pub type ConnectResponse = HashMap<String, String>;
diff --git a/lambda-events/src/event/documentdb/events/commom_types.rs b/lambda-events/src/event/documentdb/events/commom_types.rs
index 5d1bdc19..d9ff1c4d 100644
--- a/lambda-events/src/event/documentdb/events/commom_types.rs
+++ b/lambda-events/src/event/documentdb/events/commom_types.rs
@@ -11,34 +11,76 @@ pub struct DatabaseCollection {
     db: String,
     #[serde(default)]
     coll: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 pub struct DocumentId {
     #[serde(rename = "_data")]
     pub data: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 pub struct DocumentKeyIdOid {
     #[serde(rename = "$oid")]
     pub oid: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 pub struct DocumentKeyId {
     #[serde(rename = "_id")]
     pub id: DocumentKeyIdOid,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 pub struct InnerTimestamp {
     t: usize,
     i: usize,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 pub struct Timestamp {
     #[serde(rename = "$timestamp")]
     pub timestamp: InnerTimestamp,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/documentdb/events/delete_event.rs b/lambda-events/src/event/documentdb/events/delete_event.rs
index 7761d62f..4085a88b 100644
--- a/lambda-events/src/event/documentdb/events/delete_event.rs
+++ b/lambda-events/src/event/documentdb/events/delete_event.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 use super::commom_types::{AnyDocument, DatabaseCollection, DocumentId, DocumentKeyId, Timestamp};
 
@@ -17,4 +19,11 @@ pub struct ChangeDeleteEvent {
     // operation_type: String,
     #[serde(default)]
     txn_number: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/documentdb/events/drop_database_event.rs b/lambda-events/src/event/documentdb/events/drop_database_event.rs
index 273c897c..fed75259 100644
--- a/lambda-events/src/event/documentdb/events/drop_database_event.rs
+++ b/lambda-events/src/event/documentdb/events/drop_database_event.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 use super::commom_types::{AnyDocument, DatabaseCollection, DocumentId, Timestamp};
 
@@ -16,4 +18,11 @@ pub struct ChangeDropDatabaseEvent {
     // operation_type: String,
     #[serde(default)]
     txn_number: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/documentdb/events/drop_event.rs b/lambda-events/src/event/documentdb/events/drop_event.rs
index a6f92934..23a8d7a8 100644
--- a/lambda-events/src/event/documentdb/events/drop_event.rs
+++ b/lambda-events/src/event/documentdb/events/drop_event.rs
@@ -1,5 +1,7 @@
 use super::commom_types::{AnyDocument, DatabaseCollection, DocumentId, Timestamp};
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -15,4 +17,11 @@ pub struct ChangeDropEvent {
     // operation_type: String,
     #[serde(default)]
     txn_number: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/documentdb/events/insert_event.rs b/lambda-events/src/event/documentdb/events/insert_event.rs
index 2f4df397..aaf82ddc 100644
--- a/lambda-events/src/event/documentdb/events/insert_event.rs
+++ b/lambda-events/src/event/documentdb/events/insert_event.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 use super::commom_types::{AnyDocument, DatabaseCollection, DocumentId, DocumentKeyId, Timestamp};
 
@@ -17,4 +19,11 @@ pub struct ChangeInsertEvent {
     //operation_type: String,
     #[serde(default)]
     txn_number: Option<AnyDocument>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/documentdb/events/invalidate_event.rs b/lambda-events/src/event/documentdb/events/invalidate_event.rs
index 47469ff9..8e8ef930 100644
--- a/lambda-events/src/event/documentdb/events/invalidate_event.rs
+++ b/lambda-events/src/event/documentdb/events/invalidate_event.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 use super::commom_types::{DocumentId, Timestamp};
 
@@ -10,4 +12,11 @@ pub struct ChangeInvalidateEvent {
     #[serde(default)]
     cluster_time: Option<Timestamp>,
     // operation_type: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/documentdb/events/rename_event.rs b/lambda-events/src/event/documentdb/events/rename_event.rs
index 8bc250fb..f1761a2a 100644
--- a/lambda-events/src/event/documentdb/events/rename_event.rs
+++ b/lambda-events/src/event/documentdb/events/rename_event.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 use super::commom_types::{AnyDocument, DatabaseCollection, DocumentId, Timestamp};
 
@@ -18,4 +20,11 @@ pub struct ChangeRenameEvent {
     #[serde(default)]
     txn_number: Option<String>,
     to: DatabaseCollection,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/documentdb/events/replace_event.rs b/lambda-events/src/event/documentdb/events/replace_event.rs
index c253e272..b0245241 100644
--- a/lambda-events/src/event/documentdb/events/replace_event.rs
+++ b/lambda-events/src/event/documentdb/events/replace_event.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 use super::commom_types::{AnyDocument, DatabaseCollection, DocumentId, DocumentKeyId, Timestamp};
 
@@ -17,4 +19,11 @@ pub struct ChangeReplaceEvent {
     // operation_type: String,
     #[serde(default)]
     txn_number: Option<AnyDocument>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/documentdb/events/update_event.rs b/lambda-events/src/event/documentdb/events/update_event.rs
index 04369cf0..5d3795d0 100644
--- a/lambda-events/src/event/documentdb/events/update_event.rs
+++ b/lambda-events/src/event/documentdb/events/update_event.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 use super::commom_types::{AnyDocument, DatabaseCollection, DocumentId, DocumentKeyId, Timestamp};
 
@@ -7,6 +9,13 @@ use super::commom_types::{AnyDocument, DatabaseCollection, DocumentId, DocumentK
 pub struct UpdateTruncate {
     field: String,
     new_size: usize,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -15,6 +24,13 @@ pub struct UpdateDescription {
     removed_fields: Vec<String>,
     truncated_arrays: Vec<UpdateTruncate>,
     updated_fields: AnyDocument,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -33,4 +49,11 @@ pub struct ChangeUpdateEvent {
     update_description: UpdateDescription,
     #[serde(default)]
     txn_number: Option<AnyDocument>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/documentdb/mod.rs b/lambda-events/src/event/documentdb/mod.rs
index 67f7c9ad..fa753823 100644
--- a/lambda-events/src/event/documentdb/mod.rs
+++ b/lambda-events/src/event/documentdb/mod.rs
@@ -6,6 +6,8 @@ use self::events::{
     replace_event::ChangeReplaceEvent, update_event::ChangeUpdateEvent,
 };
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 #[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(tag = "operationType", rename_all = "camelCase")]
@@ -23,6 +25,13 @@ pub enum ChangeEvent {
 #[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize)]
 pub struct DocumentDbInnerEvent {
     pub event: ChangeEvent,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -33,6 +42,13 @@ pub struct DocumentDbEvent {
     pub events: Vec<DocumentDbInnerEvent>,
     #[serde(default)]
     pub event_source: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/dynamodb/mod.rs b/lambda-events/src/event/dynamodb/mod.rs
index 91380f82..2a99ed69 100644
--- a/lambda-events/src/event/dynamodb/mod.rs
+++ b/lambda-events/src/event/dynamodb/mod.rs
@@ -5,6 +5,8 @@ use crate::{
 };
 use chrono::{DateTime, Utc};
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 use std::fmt;
 
 #[cfg(test)]
@@ -115,6 +117,13 @@ impl fmt::Display for KeyType {
 pub struct Event {
     #[serde(rename = "Records")]
     pub records: Vec<EventRecord>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `TimeWindowEvent` represents an Amazon Dynamodb event when using time windows
@@ -128,6 +137,13 @@ pub struct TimeWindowEvent {
     #[serde(rename = "TimeWindowProperties")]
     #[serde(flatten)]
     pub time_window_properties: TimeWindowProperties,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `TimeWindowEventResponse` is the outer structure to report batch item failures for DynamoDBTimeWindowEvent.
@@ -138,6 +154,13 @@ pub struct TimeWindowEventResponse {
     #[serde(flatten)]
     pub time_window_event_response_properties: TimeWindowEventResponseProperties,
     pub batch_item_failures: Vec<DynamoDbBatchItemFailure>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// EventRecord stores information about each record of a DynamoDb stream event
@@ -198,6 +221,13 @@ pub struct EventRecord {
     /// The DynamoDB table that this event was recorded for.
     #[serde(default)]
     pub table_name: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -207,6 +237,13 @@ pub struct UserIdentity {
     pub type_: String,
     #[serde(default)]
     pub principal_id: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `DynamoDbStreamRecord` represents a description of a single data modification that was performed on an item
@@ -248,6 +285,13 @@ pub struct StreamRecord {
     #[serde(default)]
     #[serde(rename = "StreamViewType")]
     pub stream_view_type: Option<StreamViewType>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/ecr_scan/mod.rs b/lambda-events/src/event/ecr_scan/mod.rs
index 5502e81a..f68b4e57 100644
--- a/lambda-events/src/event/ecr_scan/mod.rs
+++ b/lambda-events/src/event/ecr_scan/mod.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -20,6 +22,13 @@ pub struct EcrScanEvent {
     #[serde(default)]
     pub account: Option<String>,
     pub detail: EcrScanEventDetailType,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -38,6 +47,13 @@ pub struct EcrScanEventDetailType {
     pub image_digest: Option<String>,
     #[serde(rename = "image-tags")]
     pub image_tags: Vec<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -61,6 +77,13 @@ pub struct EcrScanEventFindingSeverityCounts {
     #[serde(default)]
     #[serde(rename = "UNDEFINED")]
     pub undefined: Option<i64>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/eventbridge/mod.rs b/lambda-events/src/event/eventbridge/mod.rs
index 5ed14840..f2d86550 100644
--- a/lambda-events/src/event/eventbridge/mod.rs
+++ b/lambda-events/src/event/eventbridge/mod.rs
@@ -30,6 +30,13 @@ where
     pub resources: Option<Vec<String>>,
     #[serde(bound = "")]
     pub detail: T1,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/firehose/mod.rs b/lambda-events/src/event/firehose/mod.rs
index 6a0a13fd..195c6da9 100644
--- a/lambda-events/src/event/firehose/mod.rs
+++ b/lambda-events/src/event/firehose/mod.rs
@@ -3,6 +3,8 @@ use crate::{
     encodings::{Base64Data, MillisecondTimestamp},
 };
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 use std::collections::HashMap;
 
 /// `KinesisFirehoseEvent` represents the input event from Amazon Kinesis Firehose. It is used as the input parameter.
@@ -20,6 +22,13 @@ pub struct KinesisFirehoseEvent {
     #[serde(default)]
     pub region: Option<String>,
     pub records: Vec<KinesisFirehoseEventRecord>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -31,12 +40,26 @@ pub struct KinesisFirehoseEventRecord {
     pub data: Base64Data,
     #[serde(rename = "kinesisRecordMetadata")]
     pub kinesis_firehose_record_metadata: Option<KinesisFirehoseRecordMetadata>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct KinesisFirehoseResponse {
     pub records: Vec<KinesisFirehoseResponseRecord>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -49,6 +72,13 @@ pub struct KinesisFirehoseResponseRecord {
     pub result: Option<String>,
     pub data: Base64Data,
     pub metadata: KinesisFirehoseResponseRecordMetadata,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -57,6 +87,13 @@ pub struct KinesisFirehoseResponseRecordMetadata {
     #[serde(deserialize_with = "deserialize_lambda_map")]
     #[serde(default)]
     pub partition_keys: HashMap<String, String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -70,6 +107,13 @@ pub struct KinesisFirehoseRecordMetadata {
     pub sequence_number: Option<String>,
     pub subsequence_number: i64,
     pub approximate_arrival_timestamp: MillisecondTimestamp,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/iam/mod.rs b/lambda-events/src/event/iam/mod.rs
index 36f59c7b..f4301b1e 100644
--- a/lambda-events/src/event/iam/mod.rs
+++ b/lambda-events/src/event/iam/mod.rs
@@ -1,3 +1,5 @@
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 use std::{borrow::Cow, collections::HashMap, fmt};
 
 use serde::{
@@ -12,6 +14,13 @@ pub struct IamPolicyDocument {
     #[serde(default)]
     pub version: Option<String>,
     pub statement: Vec<IamPolicyStatement>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `IamPolicyStatement` represents one statement from IAM policy with action, effect and resource
@@ -27,6 +36,13 @@ pub struct IamPolicyStatement {
     #[serde(default, deserialize_with = "deserialize_policy_condition")]
     #[serde(skip_serializing_if = "Option::is_none")]
     pub condition: Option<IamPolicyCondition>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 pub type IamPolicyCondition = HashMap<String, HashMap<String, Vec<String>>>;
@@ -178,6 +194,8 @@ mod tests {
             effect: IamPolicyEffect::Allow,
             resource: vec!["some:resource".into()],
             condition: None,
+            #[cfg(feature = "catch-all-fields")]
+            other: Default::default(),
         };
         let policy_ser = serde_json::to_value(policy).unwrap();
 
diff --git a/lambda-events/src/event/iot/mod.rs b/lambda-events/src/event/iot/mod.rs
index 07352120..cb262bd0 100644
--- a/lambda-events/src/event/iot/mod.rs
+++ b/lambda-events/src/event/iot/mod.rs
@@ -1,6 +1,8 @@
 use crate::{custom_serde::serialize_headers, encodings::Base64Data, iam::IamPolicyDocument};
 use http::HeaderMap;
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 /// `IoTCoreCustomAuthorizerRequest` represents the request to an IoT Core custom authorizer.
 /// See <https://docs.aws.amazon.com/iot/latest/developerguide/config-custom-auth.html>
@@ -13,6 +15,13 @@ pub struct IoTCoreCustomAuthorizerRequest {
     pub protocols: Vec<String>,
     pub protocol_data: Option<IoTCoreProtocolData>,
     pub connection_metadata: Option<IoTCoreConnectionMetadata>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -21,6 +30,13 @@ pub struct IoTCoreProtocolData {
     pub tls: Option<IoTCoreTlsContext>,
     pub http: Option<IoTCoreHttpContext>,
     pub mqtt: Option<IoTCoreMqttContext>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -28,6 +44,13 @@ pub struct IoTCoreProtocolData {
 pub struct IoTCoreTlsContext {
     #[serde(default)]
     pub server_name: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -38,6 +61,13 @@ pub struct IoTCoreHttpContext {
     pub headers: HeaderMap,
     #[serde(default)]
     pub query_string: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -48,6 +78,13 @@ pub struct IoTCoreMqttContext {
     pub password: Base64Data,
     #[serde(default)]
     pub username: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -55,6 +92,13 @@ pub struct IoTCoreMqttContext {
 pub struct IoTCoreConnectionMetadata {
     #[serde(default)]
     pub id: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `IoTCoreCustomAuthorizerResponse` represents the response from an IoT Core custom authorizer.
@@ -68,6 +112,13 @@ pub struct IoTCoreCustomAuthorizerResponse {
     pub disconnect_after_in_seconds: u32,
     pub refresh_after_in_seconds: u32,
     pub policy_documents: Vec<Option<IamPolicyDocument>>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/iot_1_click/mod.rs b/lambda-events/src/event/iot_1_click/mod.rs
index bf010b50..866918a9 100644
--- a/lambda-events/src/event/iot_1_click/mod.rs
+++ b/lambda-events/src/event/iot_1_click/mod.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 use std::collections::HashMap;
 
 use crate::custom_serde::deserialize_lambda_map;
@@ -11,12 +13,26 @@ pub struct IoTOneClickEvent {
     pub device_event: IoTOneClickDeviceEvent,
     pub device_info: IoTOneClickDeviceInfo,
     pub placement_info: IoTOneClickPlacementInfo,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct IoTOneClickDeviceEvent {
     pub button_clicked: IoTOneClickButtonClicked,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -26,6 +42,13 @@ pub struct IoTOneClickButtonClicked {
     pub click_type: Option<String>,
     #[serde(default)]
     pub reported_time: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
@@ -39,6 +62,13 @@ pub struct IoTOneClickDeviceInfo {
     #[serde(default)]
     pub device_id: Option<String>,
     pub remaining_life: f64,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -54,6 +84,13 @@ pub struct IoTOneClickPlacementInfo {
     #[serde(deserialize_with = "deserialize_lambda_map")]
     #[serde(default)]
     pub devices: HashMap<String, String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/iot_button/mod.rs b/lambda-events/src/event/iot_button/mod.rs
index 2d2e4627..00e4f6af 100644
--- a/lambda-events/src/event/iot_button/mod.rs
+++ b/lambda-events/src/event/iot_button/mod.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -9,6 +11,13 @@ pub struct IoTButtonEvent {
     pub click_type: Option<String>,
     #[serde(default)]
     pub battery_voltage: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/iot_deprecated/mod.rs b/lambda-events/src/event/iot_deprecated/mod.rs
index 12c1df99..30475675 100644
--- a/lambda-events/src/event/iot_deprecated/mod.rs
+++ b/lambda-events/src/event/iot_deprecated/mod.rs
@@ -1,5 +1,7 @@
 use crate::iot::*;
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 /// `IoTCustomAuthorizerRequest` contains data coming in to a custom IoT device gateway authorizer function.
 /// Deprecated: Use IoTCoreCustomAuthorizerRequest instead. `IoTCustomAuthorizerRequest` does not correctly model the request schema
@@ -14,6 +16,13 @@ pub struct IoTCustomAuthorizerRequest {
     pub authorization_token: Option<String>,
     #[serde(default)]
     pub token_signature: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 pub type IoTHttpContext = IoTCoreHttpContext;
@@ -33,4 +42,11 @@ pub struct IoTCustomAuthorizerResponse {
     pub disconnect_after_in_seconds: i32,
     pub refresh_after_in_seconds: i32,
     pub policy_documents: Vec<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/kafka/mod.rs b/lambda-events/src/event/kafka/mod.rs
index 27a1e921..032f1615 100644
--- a/lambda-events/src/event/kafka/mod.rs
+++ b/lambda-events/src/event/kafka/mod.rs
@@ -1,5 +1,7 @@
 use crate::{custom_serde::deserialize_lambda_map, encodings::MillisecondTimestamp};
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 use std::collections::HashMap;
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -14,6 +16,13 @@ pub struct KafkaEvent {
     pub records: HashMap<String, Vec<KafkaRecord>>,
     #[serde(default)]
     pub bootstrap_servers: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -29,6 +38,13 @@ pub struct KafkaRecord {
     pub key: Option<String>,
     pub value: Option<String>,
     pub headers: Vec<HashMap<String, Vec<i8>>>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/kinesis/analytics.rs b/lambda-events/src/event/kinesis/analytics.rs
index 74c95606..e9f8f676 100644
--- a/lambda-events/src/event/kinesis/analytics.rs
+++ b/lambda-events/src/event/kinesis/analytics.rs
@@ -1,5 +1,7 @@
 use crate::encodings::Base64Data;
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -9,6 +11,13 @@ pub struct KinesisAnalyticsOutputDeliveryEvent {
     #[serde(default)]
     pub application_arn: Option<String>,
     pub records: Vec<KinesisAnalyticsOutputDeliveryEventRecord>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -17,12 +26,26 @@ pub struct KinesisAnalyticsOutputDeliveryEventRecord {
     #[serde(default)]
     pub record_id: Option<String>,
     pub data: Base64Data,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct KinesisAnalyticsOutputDeliveryResponse {
     pub records: Vec<KinesisAnalyticsOutputDeliveryResponseRecord>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -33,4 +56,11 @@ pub struct KinesisAnalyticsOutputDeliveryResponseRecord {
     /// possible values include Ok and DeliveryFailed
     #[serde(default)]
     pub result: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/kinesis/event.rs b/lambda-events/src/event/kinesis/event.rs
index a67da850..6b9c1c77 100644
--- a/lambda-events/src/event/kinesis/event.rs
+++ b/lambda-events/src/event/kinesis/event.rs
@@ -3,12 +3,21 @@ use crate::{
     time_window::{TimeWindowEventResponseProperties, TimeWindowProperties},
 };
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct KinesisEvent {
     #[serde(rename = "Records")]
     pub records: Vec<KinesisEventRecord>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `KinesisTimeWindowEvent` represents an Amazon Dynamodb event when using time windows
@@ -22,6 +31,13 @@ pub struct KinesisTimeWindowEvent {
     #[serde(rename = "TimeWindowProperties")]
     #[serde(flatten)]
     pub time_window_properties: TimeWindowProperties,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `KinesisTimeWindowEventResponse` is the outer structure to report batch item failures for KinesisTimeWindowEvent.
@@ -32,6 +48,13 @@ pub struct KinesisTimeWindowEventResponse {
     #[serde(flatten)]
     pub time_window_event_response_properties: TimeWindowEventResponseProperties,
     // pub batch_item_failures: Vec<KinesisBatchItemFailure>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -57,6 +80,13 @@ pub struct KinesisEventRecord {
     #[serde(default)]
     pub invoke_identity_arn: Option<String>,
     pub kinesis: KinesisRecord,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -72,6 +102,13 @@ pub struct KinesisRecord {
     pub sequence_number: String,
     #[serde(default)]
     pub kinesis_schema_version: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
diff --git a/lambda-events/src/event/lambda_function_urls/mod.rs b/lambda-events/src/event/lambda_function_urls/mod.rs
index 37ddfe39..a754af0d 100644
--- a/lambda-events/src/event/lambda_function_urls/mod.rs
+++ b/lambda-events/src/event/lambda_function_urls/mod.rs
@@ -1,5 +1,7 @@
 use http::HeaderMap;
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 use std::collections::HashMap;
 
 use crate::custom_serde::{deserialize_lambda_map, serialize_headers};
@@ -25,6 +27,13 @@ pub struct LambdaFunctionUrlRequest {
     pub request_context: LambdaFunctionUrlRequestContext,
     pub body: Option<String>,
     pub is_base64_encoded: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `LambdaFunctionUrlRequestContext` contains the information to identify the AWS account and resources invoking the Lambda function.
@@ -50,6 +59,13 @@ pub struct LambdaFunctionUrlRequestContext {
     pub time: Option<String>,
     pub time_epoch: i64,
     pub http: LambdaFunctionUrlRequestContextHttpDescription,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `LambdaFunctionUrlRequestContextAuthorizerDescription` contains authorizer information for the request context.
@@ -57,6 +73,13 @@ pub struct LambdaFunctionUrlRequestContext {
 #[serde(rename_all = "camelCase")]
 pub struct LambdaFunctionUrlRequestContextAuthorizerDescription {
     pub iam: Option<LambdaFunctionUrlRequestContextAuthorizerIamDescription>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `LambdaFunctionUrlRequestContextAuthorizerIamDescription` contains IAM information for the request context.
@@ -73,6 +96,13 @@ pub struct LambdaFunctionUrlRequestContextAuthorizerIamDescription {
     pub user_arn: Option<String>,
     #[serde(default)]
     pub user_id: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `LambdaFunctionUrlRequestContextHttpDescription` contains HTTP information for the request context.
@@ -89,6 +119,13 @@ pub struct LambdaFunctionUrlRequestContextHttpDescription {
     pub source_ip: Option<String>,
     #[serde(default)]
     pub user_agent: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `LambdaFunctionUrlResponse` configures the HTTP response to be returned by Lambda Function URL for the request.
@@ -103,4 +140,11 @@ pub struct LambdaFunctionUrlResponse {
     pub body: Option<String>,
     pub is_base64_encoded: bool,
     pub cookies: Vec<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/lex/mod.rs b/lambda-events/src/event/lex/mod.rs
index d8f9403c..c9c23c53 100644
--- a/lambda-events/src/event/lex/mod.rs
+++ b/lambda-events/src/event/lex/mod.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 use std::collections::HashMap;
 
 use crate::custom_serde::deserialize_lambda_map;
@@ -20,6 +22,13 @@ pub struct LexEvent {
     pub alternative_intents: Option<Vec<LexAlternativeIntents>>,
     /// Deprecated: the DialogAction field is never populated by Lex events
     pub dialog_action: Option<LexDialogAction>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -28,6 +37,13 @@ pub struct LexBot {
     pub name: Option<String>,
     pub alias: Option<String>,
     pub version: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
@@ -40,6 +56,13 @@ pub struct LexCurrentIntent {
     #[serde(default)]
     pub slot_details: HashMap<String, SlotDetail>,
     pub confirmation_status: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
@@ -52,6 +75,13 @@ pub struct LexAlternativeIntents {
     #[serde(default)]
     pub slot_details: HashMap<String, SlotDetail>,
     pub confirmation_status: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -59,6 +89,13 @@ pub struct LexAlternativeIntents {
 pub struct SlotDetail {
     pub resolutions: Option<Vec<HashMap<String, String>>>,
     pub original_value: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -73,6 +110,13 @@ pub struct LexDialogAction {
     pub slots: Option<Slots>,
     pub slot_to_elicit: Option<String>,
     pub response_card: Option<LexResponseCard>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 pub type SessionAttributes = HashMap<String, String>;
@@ -84,6 +128,13 @@ pub type Slots = HashMap<String, Option<String>>;
 pub struct LexResponse {
     pub session_attributes: SessionAttributes,
     pub dialog_action: Option<LexDialogAction>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -92,6 +143,13 @@ pub struct LexResponseCard {
     pub version: Option<i64>,
     pub content_type: Option<String>,
     pub generic_attachments: Option<Vec<Attachment>>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -102,6 +160,13 @@ pub struct Attachment {
     pub image_url: Option<String>,
     pub attachment_link_url: Option<String>,
     pub buttons: Option<Vec<HashMap<String, String>>>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/rabbitmq/mod.rs b/lambda-events/src/event/rabbitmq/mod.rs
index 23327276..fd9088c5 100644
--- a/lambda-events/src/event/rabbitmq/mod.rs
+++ b/lambda-events/src/event/rabbitmq/mod.rs
@@ -15,6 +15,13 @@ pub struct RabbitMqEvent {
     #[serde(default)]
     #[serde(rename = "rmqMessagesByQueue")]
     pub messages_by_queue: HashMap<String, Vec<RabbitMqMessage>>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -24,6 +31,13 @@ pub struct RabbitMqMessage {
     #[serde(default)]
     pub data: Option<String>,
     pub redelivered: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -56,6 +70,13 @@ where
     pub app_id: Option<String>,
     pub cluster_id: Option<String>,
     pub body_size: u64,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/s3/batch_job.rs b/lambda-events/src/event/s3/batch_job.rs
index e3eb691e..133960f3 100644
--- a/lambda-events/src/event/s3/batch_job.rs
+++ b/lambda-events/src/event/s3/batch_job.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 /// `S3BatchJobEvent` encapsulates the detail of a s3 batch job
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -10,6 +12,13 @@ pub struct S3BatchJobEvent {
     pub invocation_id: Option<String>,
     pub job: S3BatchJob,
     pub tasks: Vec<S3BatchJobTask>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `S3BatchJob` whichs have the job id
@@ -18,6 +27,13 @@ pub struct S3BatchJobEvent {
 pub struct S3BatchJob {
     #[serde(default)]
     pub id: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `S3BatchJobTask` represents one task in the s3 batch job and have all task details
@@ -32,6 +48,13 @@ pub struct S3BatchJobTask {
     pub s3_version_id: Option<String>,
     #[serde(default)]
     pub s3_bucket_arn: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `S3BatchJobResponse` is the response of a iven s3 batch job with the results
@@ -45,6 +68,13 @@ pub struct S3BatchJobResponse {
     #[serde(default)]
     pub invocation_id: Option<String>,
     pub results: Vec<S3BatchJobResult>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `S3BatchJobResult` represents the result of a given task
@@ -57,4 +87,11 @@ pub struct S3BatchJobResult {
     pub result_code: Option<String>,
     #[serde(default)]
     pub result_string: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/event/s3/event.rs b/lambda-events/src/event/s3/event.rs
index e062c7d2..46a334db 100644
--- a/lambda-events/src/event/s3/event.rs
+++ b/lambda-events/src/event/s3/event.rs
@@ -1,5 +1,7 @@
 use chrono::{DateTime, Utc};
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 use std::collections::HashMap;
 
 use crate::custom_serde::deserialize_lambda_map;
@@ -10,6 +12,13 @@ use crate::custom_serde::deserialize_lambda_map;
 pub struct S3Event {
     #[serde(rename = "Records")]
     pub records: Vec<S3EventRecord>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `S3EventRecord` which wrap record data
@@ -32,6 +41,13 @@ pub struct S3EventRecord {
     #[serde(default)]
     pub response_elements: HashMap<String, String>,
     pub s3: S3Entity,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -39,6 +55,13 @@ pub struct S3EventRecord {
 pub struct S3UserIdentity {
     #[serde(default)]
     pub principal_id: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -47,6 +70,13 @@ pub struct S3RequestParameters {
     #[serde(default)]
     #[serde(rename = "sourceIPAddress")]
     pub source_ip_address: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -59,6 +89,13 @@ pub struct S3Entity {
     pub configuration_id: Option<String>,
     pub bucket: S3Bucket,
     pub object: S3Object,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -70,6 +107,13 @@ pub struct S3Bucket {
     pub owner_identity: Option<S3UserIdentity>,
     #[serde(default)]
     pub arn: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -86,6 +130,13 @@ pub struct S3Object {
     pub e_tag: Option<String>,
     #[serde(default)]
     pub sequencer: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/s3/object_lambda.rs b/lambda-events/src/event/s3/object_lambda.rs
index 1cd7b934..3b01fe73 100644
--- a/lambda-events/src/event/s3/object_lambda.rs
+++ b/lambda-events/src/event/s3/object_lambda.rs
@@ -24,6 +24,13 @@ where
     pub user_request: UserRequest,
     pub user_identity: UserIdentity,
     pub protocol_version: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `GetObjectContext` contains the input and output details
@@ -34,6 +41,13 @@ pub struct GetObjectContext {
     pub input_s3_url: String,
     pub output_route: String,
     pub output_token: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `HeadObjectContext`
@@ -42,6 +56,13 @@ pub struct GetObjectContext {
 #[serde(rename_all = "camelCase")]
 pub struct HeadObjectContext {
     pub input_s3_url: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ListObjectsContext`
@@ -50,6 +71,13 @@ pub struct HeadObjectContext {
 #[serde(rename_all = "camelCase")]
 pub struct ListObjectsContext {
     pub input_s3_url: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `ListObjectsV2Context`
@@ -58,6 +86,13 @@ pub struct ListObjectsContext {
 #[serde(rename_all = "camelCase")]
 pub struct ListObjectsV2Context {
     pub input_s3_url: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `Configuration` contains information about the Object Lambda access point
@@ -72,6 +107,13 @@ where
     pub supporting_access_point_arn: String,
     #[serde(default, bound = "")]
     pub payload: P,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `UserRequest` contains information about the original call to S3 Object Lambda
@@ -82,6 +124,13 @@ pub struct UserRequest {
     #[serde(deserialize_with = "deserialize_headers", default)]
     #[serde(serialize_with = "serialize_headers")]
     pub headers: HeaderMap,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `UserIdentity` contains details about the identity that made the call to S3 Object Lambda
@@ -94,6 +143,13 @@ pub struct UserIdentity {
     pub account_id: String,
     pub access_key_id: String,
     pub session_context: Option<SessionContext>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -102,6 +158,13 @@ pub struct SessionContext {
     pub attributes: HashMap<String, String>,
     #[serde(default)]
     pub session_issuer: Option<SessionIssuer>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -112,6 +175,13 @@ pub struct SessionIssuer {
     pub arn: String,
     pub account_id: String,
     pub user_name: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/secretsmanager/mod.rs b/lambda-events/src/event/secretsmanager/mod.rs
index 3ed8d238..2c5b497c 100644
--- a/lambda-events/src/event/secretsmanager/mod.rs
+++ b/lambda-events/src/event/secretsmanager/mod.rs
@@ -1,4 +1,6 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
 #[serde(rename_all = "PascalCase")]
@@ -6,6 +8,13 @@ pub struct SecretsManagerSecretRotationEvent {
     pub step: String,
     pub secret_id: String,
     pub client_request_token: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/ses/mod.rs b/lambda-events/src/event/ses/mod.rs
index 2a60957a..78262b0b 100644
--- a/lambda-events/src/event/ses/mod.rs
+++ b/lambda-events/src/event/ses/mod.rs
@@ -1,5 +1,7 @@
 use chrono::{DateTime, Utc};
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 /// `SimpleEmailEvent` is the outer structure of an event sent via SES.
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -7,6 +9,13 @@ use serde::{Deserialize, Serialize};
 pub struct SimpleEmailEvent {
     #[serde(rename = "Records")]
     pub records: Vec<SimpleEmailRecord>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -17,6 +26,13 @@ pub struct SimpleEmailRecord {
     #[serde(default)]
     pub event_source: Option<String>,
     pub ses: SimpleEmailService,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -25,6 +41,13 @@ pub struct SimpleEmailService {
     pub mail: SimpleEmailMessage,
     pub receipt: SimpleEmailReceipt,
     pub content: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -39,6 +62,13 @@ pub struct SimpleEmailMessage {
     pub headers_truncated: bool,
     #[serde(default)]
     pub message_id: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -55,6 +85,13 @@ pub struct SimpleEmailReceipt {
     pub virus_verdict: SimpleEmailVerdict,
     pub action: SimpleEmailReceiptAction,
     pub processing_time_millis: i64,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -64,6 +101,13 @@ pub struct SimpleEmailHeader {
     pub name: Option<String>,
     #[serde(default)]
     pub value: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -79,6 +123,13 @@ pub struct SimpleEmailCommonHeaders {
     pub date: Option<String>,
     #[serde(default)]
     pub subject: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `SimpleEmailReceiptAction` is a logical union of fields present in all action
@@ -100,6 +151,13 @@ pub struct SimpleEmailReceiptAction {
     pub invocation_type: Option<String>,
     pub function_arn: Option<String>,
     pub organization_arn: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
@@ -107,6 +165,13 @@ pub struct SimpleEmailReceiptAction {
 pub struct SimpleEmailVerdict {
     #[serde(default)]
     pub status: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 pub type SimpleEmailDispositionValue = String;
@@ -116,6 +181,13 @@ pub type SimpleEmailDispositionValue = String;
 #[serde(rename_all = "camelCase")]
 pub struct SimpleEmailDisposition {
     pub disposition: SimpleEmailDispositionValue,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/sns/mod.rs b/lambda-events/src/event/sns/mod.rs
index 0fda569d..f68ec984 100644
--- a/lambda-events/src/event/sns/mod.rs
+++ b/lambda-events/src/event/sns/mod.rs
@@ -1,5 +1,7 @@
 use chrono::{DateTime, Utc};
 use serde::{de::DeserializeOwned, Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 use std::collections::HashMap;
 
 use crate::custom_serde::{deserialize_lambda_map, deserialize_nullish_boolean};
@@ -11,6 +13,14 @@ use crate::custom_serde::{deserialize_lambda_map, deserialize_nullish_boolean};
 #[serde(rename_all = "PascalCase")]
 pub struct SnsEvent {
     pub records: Vec<SnsRecord>,
+
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// SnsRecord stores information about each record of a SNS event
@@ -28,6 +38,14 @@ pub struct SnsRecord {
 
     /// An SNS object representing the SNS message.
     pub sns: SnsMessage,
+
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// SnsMessage stores information about each record of a SNS event
@@ -76,6 +94,14 @@ pub struct SnsMessage {
     #[serde(deserialize_with = "deserialize_lambda_map")]
     #[serde(default)]
     pub message_attributes: HashMap<String, MessageAttribute>,
+
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// An alternate `Event` notification event to use alongside `SnsRecordObj<T>` and `SnsMessageObj<T>` if you want to deserialize an object inside your SNS messages rather than getting an `Option<String>` message
@@ -86,6 +112,14 @@ pub struct SnsMessage {
 #[serde(bound(deserialize = "T: DeserializeOwned"))]
 pub struct SnsEventObj<T: Serialize> {
     pub records: Vec<SnsRecordObj<T>>,
+
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// Alternative to `SnsRecord`, used alongside `SnsEventObj<T>` and `SnsMessageObj<T>` when deserializing nested objects from within SNS messages)
@@ -104,6 +138,14 @@ pub struct SnsRecordObj<T: Serialize> {
 
     /// An SNS object representing the SNS message.
     pub sns: SnsMessageObj<T>,
+
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// Alternate version of `SnsMessage` to use in conjunction with `SnsEventObj<T>` and `SnsRecordObj<T>` for deserializing the message into a struct of type `T`
@@ -156,6 +198,14 @@ pub struct SnsMessageObj<T: Serialize> {
     #[serde(deserialize_with = "deserialize_lambda_map")]
     #[serde(default)]
     pub message_attributes: HashMap<String, MessageAttribute>,
+
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// Structured metadata items (such as timestamps, geospatial data, signatures, and identifiers) about the message.
@@ -172,6 +222,14 @@ pub struct MessageAttribute {
     /// The user-specified message attribute value.
     #[serde(rename = "Value")]
     pub value: String,
+
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, PartialEq, Serialize)]
@@ -188,6 +246,13 @@ pub struct CloudWatchAlarmPayload {
     pub alarm_arn: String,
     pub old_state_value: String,
     pub trigger: CloudWatchAlarmTrigger,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, PartialEq, Serialize)]
@@ -208,6 +273,13 @@ pub struct CloudWatchAlarmTrigger {
     pub unit: Option<String>,
     #[serde(default)]
     pub dimensions: Vec<CloudWatchDimension>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, PartialEq, Serialize)]
@@ -220,6 +292,13 @@ pub struct CloudWatchMetricDataQuery {
     pub period: Option<i64>,
     #[serde(default, deserialize_with = "deserialize_nullish_boolean")]
     pub return_data: bool,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, PartialEq, Serialize)]
@@ -229,6 +308,13 @@ pub struct CloudWatchMetricStat {
     pub period: i64,
     pub stat: String,
     pub unit: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, PartialEq, Serialize)]
@@ -238,12 +324,26 @@ pub struct CloudWatchMetric {
     pub dimensions: Vec<CloudWatchDimension>,
     pub metric_name: Option<String>,
     pub namespace: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 pub struct CloudWatchDimension {
     pub name: String,
     pub value: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/sqs/mod.rs b/lambda-events/src/event/sqs/mod.rs
index 563dda1a..64a368ca 100644
--- a/lambda-events/src/event/sqs/mod.rs
+++ b/lambda-events/src/event/sqs/mod.rs
@@ -1,5 +1,7 @@
 use crate::{custom_serde::deserialize_lambda_map, encodings::Base64Data};
 use serde::{de::DeserializeOwned, Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 use std::collections::HashMap;
 
 /// The Event sent to Lambda from SQS. Contains 1 or more individual SQS Messages
@@ -8,6 +10,13 @@ use std::collections::HashMap;
 pub struct SqsEvent {
     #[serde(rename = "Records")]
     pub records: Vec<SqsMessage>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// An individual SQS Message, its metadata, and Message Attributes
@@ -38,6 +47,13 @@ pub struct SqsMessage {
     pub event_source: Option<String>,
     #[serde(default)]
     pub aws_region: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// Alternative to `SqsEvent` to be used alongside `SqsMessageObj<T>` when you need to deserialize a nested object into a struct of type `T` within the SQS Message rather than just using the raw SQS Message string
@@ -48,6 +64,13 @@ pub struct SqsEventObj<T: Serialize> {
     #[serde(rename = "Records")]
     #[serde(bound(deserialize = "T: DeserializeOwned"))]
     pub records: Vec<SqsMessageObj<T>>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// Alternative to `SqsMessage` to be used alongside `SqsEventObj<T>` when you need to deserialize a nested object into a struct of type `T` within the SQS Message rather than just using the raw SQS Message string
@@ -83,6 +106,13 @@ pub struct SqsMessageObj<T: Serialize> {
     pub event_source: Option<String>,
     #[serde(default)]
     pub aws_region: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
@@ -96,18 +126,39 @@ pub struct SqsMessageAttribute {
     pub binary_list_values: Vec<Base64Data>,
     #[serde(default)]
     pub data_type: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct SqsBatchResponse {
     pub batch_item_failures: Vec<BatchItemFailure>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct BatchItemFailure {
     pub item_identifier: String,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// The Event sent to Lambda from the SQS API. Contains 1 or more individual SQS Messages
@@ -117,6 +168,13 @@ pub struct BatchItemFailure {
 pub struct SqsApiEventObj<T: Serialize> {
     #[serde(bound(deserialize = "T: DeserializeOwned"))]
     pub messages: Vec<SqsApiMessageObj<T>>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// The Event sent to Lambda from SQS API. Contains 1 or more individual SQS Messages
@@ -124,6 +182,13 @@ pub struct SqsApiEventObj<T: Serialize> {
 #[serde(rename_all = "camelCase")]
 pub struct SqsApiEvent {
     pub messages: Vec<SqsApiMessage>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// Alternative to SqsApiEvent to be used alongside `SqsApiMessageObj<T>` when you need to
@@ -153,6 +218,13 @@ pub struct SqsApiMessageObj<T: Serialize> {
     #[serde(deserialize_with = "deserialize_lambda_map")]
     #[serde(default)]
     pub message_attributes: HashMap<String, SqsMessageAttribute>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// An individual SQS API Message, its metadata, and Message Attributes
@@ -176,6 +248,13 @@ pub struct SqsApiMessage {
     #[serde(deserialize_with = "deserialize_lambda_map")]
     #[serde(default)]
     pub message_attributes: HashMap<String, SqsMessageAttribute>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 #[cfg(test)]
diff --git a/lambda-events/src/event/streams/mod.rs b/lambda-events/src/event/streams/mod.rs
index 9e0fd76f..673217fc 100644
--- a/lambda-events/src/event/streams/mod.rs
+++ b/lambda-events/src/event/streams/mod.rs
@@ -1,10 +1,19 @@
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "catch-all-fields")]
+use serde_json::Value;
 
 /// `KinesisEventResponse` is the outer structure to report batch item failures for KinesisEvent.
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct KinesisEventResponse {
     pub batch_item_failures: Vec<KinesisBatchItemFailure>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `KinesisBatchItemFailure` is the individual record which failed processing.
@@ -13,6 +22,13 @@ pub struct KinesisEventResponse {
 pub struct KinesisBatchItemFailure {
     #[serde(default)]
     pub item_identifier: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `DynamoDbEventResponse` is the outer structure to report batch item failures for DynamoDBEvent.
@@ -20,6 +36,13 @@ pub struct KinesisBatchItemFailure {
 #[serde(rename_all = "camelCase")]
 pub struct DynamoDbEventResponse {
     pub batch_item_failures: Vec<DynamoDbBatchItemFailure>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `DynamoDbBatchItemFailure` is the individual record which failed processing.
@@ -28,6 +51,13 @@ pub struct DynamoDbEventResponse {
 pub struct DynamoDbBatchItemFailure {
     #[serde(default)]
     pub item_identifier: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `SqsEventResponse` is the outer structure to report batch item failures for SQSEvent.
@@ -35,6 +65,13 @@ pub struct DynamoDbBatchItemFailure {
 #[serde(rename_all = "camelCase")]
 pub struct SqsEventResponse {
     pub batch_item_failures: Vec<SqsBatchItemFailure>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
 
 /// `SqsBatchItemFailure` is the individual record which failed processing.
@@ -43,4 +80,11 @@ pub struct SqsEventResponse {
 pub struct SqsBatchItemFailure {
     #[serde(default)]
     pub item_identifier: Option<String>,
+    /// Catchall to catch any additional fields that were present but not explicitly defined by this struct.
+    /// Enabled with Cargo feature `catch-all-fields`.
+    /// If `catch-all-fields` is disabled, any additional fields that are present will be ignored.
+    #[cfg(feature = "catch-all-fields")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "catch-all-fields")))]
+    #[serde(flatten)]
+    pub other: serde_json::Map<String, Value>,
 }
diff --git a/lambda-events/src/fixtures/example-apigw-request-catch-all.json b/lambda-events/src/fixtures/example-apigw-request-catch-all.json
new file mode 100644
index 00000000..fe1955f4
--- /dev/null
+++ b/lambda-events/src/fixtures/example-apigw-request-catch-all.json
@@ -0,0 +1,137 @@
+{
+	"resource": "/{proxy+}",
+	"path": "/hello/world",
+	"httpMethod": "POST",
+	"headers": {
+		"Accept": "*/*",
+		"Accept-Encoding": "gzip, deflate",
+		"cache-control": "no-cache",
+		"CloudFront-Forwarded-Proto": "https",
+		"CloudFront-Is-Desktop-Viewer": "true",
+		"CloudFront-Is-Mobile-Viewer": "false",
+		"CloudFront-Is-SmartTV-Viewer": "false",
+		"CloudFront-Is-Tablet-Viewer": "false",
+		"CloudFront-Viewer-Country": "US",
+		"Content-Type": "application/json",
+		"headerName": "headerValue",
+		"Host": "gy415nuibc.execute-api.us-east-1.amazonaws.com",
+		"Postman-Token": "9f583ef0-ed83-4a38-aef3-eb9ce3f7a57f",
+		"User-Agent": "PostmanRuntime/2.4.5",
+		"Via": "1.1 d98420743a69852491bbdea73f7680bd.cloudfront.net (CloudFront)",
+		"X-Amz-Cf-Id": "pn-PWIJc6thYnZm5P0NMgOUglL1DYtl0gdeJky8tqsg8iS_sgsKD1A==",
+		"X-Forwarded-For": "54.240.196.186, 54.182.214.83",
+		"X-Forwarded-Port": "443",
+		"X-Forwarded-Proto": "https"
+	},
+	"multiValueHeaders": {
+		"Accept": [
+			"*/*"
+		],
+		"Accept-Encoding": [
+			"gzip, deflate"
+		],
+		"cache-control": [
+			"no-cache"
+		],
+		"CloudFront-Forwarded-Proto": [
+			"https"
+		],
+		"CloudFront-Is-Desktop-Viewer": [
+			"true"
+		],
+		"CloudFront-Is-Mobile-Viewer": [
+			"false"
+		],
+		"CloudFront-Is-SmartTV-Viewer": [
+			"false"
+		],
+		"CloudFront-Is-Tablet-Viewer": [
+			"false"
+		],
+		"CloudFront-Viewer-Country": [
+			"US"
+		],
+		"Content-Type": [
+			"application/json"
+		],
+		"headerName": [
+			"headerValue"
+		],
+		"Host": [
+			"gy415nuibc.execute-api.us-east-1.amazonaws.com"
+		],
+		"Postman-Token": [
+			"9f583ef0-ed83-4a38-aef3-eb9ce3f7a57f"
+		],
+		"User-Agent": [
+			"PostmanRuntime/2.4.5"
+		],
+		"Via": [
+			"1.1 d98420743a69852491bbdea73f7680bd.cloudfront.net (CloudFront)"
+		],
+		"X-Amz-Cf-Id": [
+			"pn-PWIJc6thYnZm5P0NMgOUglL1DYtl0gdeJky8tqsg8iS_sgsKD1A=="
+		],
+		"X-Forwarded-For": [
+			"54.240.196.186, 54.182.214.83"
+		],
+		"X-Forwarded-Port": [
+			"443"
+		],
+		"X-Forwarded-Proto": [
+			"https"
+		]
+	},
+	"queryStringParameters": {
+		"name": "me"
+	},
+	"multiValueQueryStringParameters": {
+		"name": [
+			"me"
+		]
+	},
+	"pathParameters": {
+		"proxy": "hello/world"
+	},
+	"stageVariables": {
+		"stageVariableName": "stageVariableValue"
+	},
+	"requestContext": {
+		"accountId": "12345678912",
+		"resourceId": "roq9wj",
+		"path": "/hello/world",
+		"stage": "testStage",
+		"domainName": "gy415nuibc.execute-api.us-east-2.amazonaws.com",
+		"domainPrefix": "y0ne18dixk",
+		"requestId": "deef4878-7910-11e6-8f14-25afc3e9ae33",
+		"protocol": "HTTP/1.1",
+		"identity": {
+			"cognitoIdentityPoolId": "theCognitoIdentityPoolId",
+			"accountId": "theAccountId",
+			"cognitoIdentityId": "theCognitoIdentityId",
+			"caller": "theCaller",
+			"apiKey": "theApiKey",
+			"apiKeyId": "theApiKeyId",
+			"accessKey": "ANEXAMPLEOFACCESSKEY",
+			"sourceIp": "192.168.196.186",
+			"cognitoAuthenticationType": "theCognitoAuthenticationType",
+			"cognitoAuthenticationProvider": "theCognitoAuthenticationProvider",
+			"userArn": "theUserArn",
+			"userAgent": "PostmanRuntime/2.4.5",
+			"user": "theUser",
+			"otherField": 2345
+		},
+		"authorizer": {
+			"principalId": "admin",
+			"clientId": 1,
+			"clientName": "Exata"
+		},
+		"resourcePath": "/{proxy+}",
+		"httpMethod": "POST",
+		"requestTime": "15/May/2020:06:01:09 +0000",
+		"requestTimeEpoch": 1589522469693,
+		"apiId": "gy415nuibc"
+	},
+	"body": "{\r\n\t\"a\": 1\r\n}",
+	"otherField": "foobar"
+}
diff --git a/lambda-http/Cargo.toml b/lambda-http/Cargo.toml
index 4498e275..6788f285 100644
--- a/lambda-http/Cargo.toml
+++ b/lambda-http/Cargo.toml
@@ -23,6 +23,7 @@ apigw_http = []
 apigw_websockets = []
 alb = []
 pass_through = []
+catch-all-fields = ["aws_lambda_events/catch-all-fields"]
 tracing = ["lambda_runtime/tracing"] # enables access to the Tracing utilities
 opentelemetry = ["lambda_runtime/opentelemetry"] # enables access to the OpenTelemetry layers and utilities
 anyhow = ["lambda_runtime/anyhow"] # enables From<T> for Diagnostic for anyhow error types, see README.md for more info
@@ -49,7 +50,7 @@ url = "2.2"
 
 [dependencies.aws_lambda_events]
 path = "../lambda-events"
-version = "0.16.0"
+version = "0.17.0"
 default-features = false
 features = ["alb", "apigw"]
 
diff --git a/lambda-http/src/response.rs b/lambda-http/src/response.rs
index fa8953f2..8b868d25 100644
--- a/lambda-http/src/response.rs
+++ b/lambda-http/src/response.rs
@@ -77,6 +77,9 @@ impl LambdaResponse {
                 // "multi_value_headers" fields together resulting in duplicate response headers.
                 headers: HeaderMap::new(),
                 multi_value_headers: headers,
+                // Today, this implementation doesn't provide any additional fields
+                #[cfg(feature = "catch-all-fields")]
+                other: Default::default(),
             }),
             #[cfg(feature = "apigw_http")]
             RequestOrigin::ApiGatewayV2 => {
@@ -101,6 +104,9 @@ impl LambdaResponse {
                     // are combined with commas and included in the headers field.
                     headers,
                     multi_value_headers: HeaderMap::new(),
+                    // Today, this implementation doesn't provide any additional fields
+                    #[cfg(feature = "catch-all-fields")]
+                    other: Default::default(),
                 })
             }
             #[cfg(feature = "alb")]
@@ -118,6 +124,9 @@ impl LambdaResponse {
                     status_code,
                     parts.status.canonical_reason().unwrap_or_default()
                 )),
+                // Today, this implementation doesn't provide any additional fields
+                #[cfg(feature = "catch-all-fields")]
+                other: Default::default(),
             }),
             #[cfg(feature = "apigw_websockets")]
             RequestOrigin::WebSocket => LambdaResponse::ApiGatewayV1(ApiGatewayProxyResponse {
@@ -128,6 +137,9 @@ impl LambdaResponse {
                 // "multi_value_headers" fields together resulting in duplicate response headers.
                 headers: HeaderMap::new(),
                 multi_value_headers: headers,
+                // Today, this implementation doesn't provide any additional fields
+                #[cfg(feature = "catch-all-fields")]
+                other: Default::default(),
             }),
             #[cfg(feature = "pass_through")]
             RequestOrigin::PassThrough => {
diff --git a/lambda-integration-tests/Cargo.toml b/lambda-integration-tests/Cargo.toml
index 0a9836c4..85d5fca6 100644
--- a/lambda-integration-tests/Cargo.toml
+++ b/lambda-integration-tests/Cargo.toml
@@ -21,6 +21,9 @@ serde = { version = "1.0.204", features = ["derive"] }
 [dev-dependencies]
 reqwest = { version = "0.12.5", features = ["blocking"] }
 
+[features]
+catch-all-fields = ["aws_lambda_events/catch-all-fields"]
+
 [[bin]]
 name = "helloworld"
 path = "src/helloworld.rs"
diff --git a/lambda-integration-tests/src/authorizer.rs b/lambda-integration-tests/src/authorizer.rs
index 41ddd2d8..b8dc3782 100644
--- a/lambda-integration-tests/src/authorizer.rs
+++ b/lambda-integration-tests/src/authorizer.rs
@@ -39,15 +39,21 @@ fn allow(method_arn: &str) -> ApiGatewayCustomAuthorizerResponse {
         resource: vec![method_arn.to_owned()],
         effect: aws_lambda_events::iam::IamPolicyEffect::Allow,
         condition: None,
+        #[cfg(feature = "catch-all-fields")]
+        other: Default::default(),
     };
     let policy = ApiGatewayCustomAuthorizerPolicy {
         version: Some("2012-10-17".to_string()),
         statement: vec![stmt],
+        #[cfg(feature = "catch-all-fields")]
+        other: Default::default(),
     };
     ApiGatewayCustomAuthorizerResponse {
         principal_id: Some("user".to_owned()),
         policy_document: policy,
         context: json!({ "hello": "world" }),
         usage_identifier_key: None,
+        #[cfg(feature = "catch-all-fields")]
+        other: Default::default(),
     }
 }
diff --git a/lambda-integration-tests/src/helloworld.rs b/lambda-integration-tests/src/helloworld.rs
index b40cd0c6..c3a74f8c 100644
--- a/lambda-integration-tests/src/helloworld.rs
+++ b/lambda-integration-tests/src/helloworld.rs
@@ -22,6 +22,8 @@ async fn func(_event: LambdaEvent<ApiGatewayProxyRequest>) -> Result<ApiGatewayP
         is_base64_encoded: false,
         body: Some("Hello world!".into()),
         headers,
+        #[cfg(feature = "catch-all-fields")]
+        other: Default::default(),
     };
     Ok(resp)
 }