diff --git a/android/src/main/java/com/facebook/reactnative/androidsdk/FBAppEventsLoggerModule.java b/android/src/main/java/com/facebook/reactnative/androidsdk/FBAppEventsLoggerModule.java
index 51de9330..b456c39a 100644
--- a/android/src/main/java/com/facebook/reactnative/androidsdk/FBAppEventsLoggerModule.java
+++ b/android/src/main/java/com/facebook/reactnative/androidsdk/FBAppEventsLoggerModule.java
@@ -33,6 +33,7 @@
 
 import java.math.BigDecimal;
 import java.util.Currency;
+import java.util.Locale;
 
 /**
  * <p>
@@ -133,7 +134,7 @@ public String getName() {
      */
     @ReactMethod
     public void setFlushBehavior(String flushBehavior) {
-        AppEventsLogger.setFlushBehavior(AppEventsLogger.FlushBehavior.valueOf(flushBehavior.toUpperCase()));
+        AppEventsLogger.setFlushBehavior(AppEventsLogger.FlushBehavior.valueOf(flushBehavior.toUpperCase(Locale.ROOT)));
     }
 
     /**
diff --git a/android/src/main/java/com/facebook/reactnative/androidsdk/FBLoginButtonManager.java b/android/src/main/java/com/facebook/reactnative/androidsdk/FBLoginButtonManager.java
index 90803584..2977f10d 100644
--- a/android/src/main/java/com/facebook/reactnative/androidsdk/FBLoginButtonManager.java
+++ b/android/src/main/java/com/facebook/reactnative/androidsdk/FBLoginButtonManager.java
@@ -30,6 +30,8 @@
 import com.facebook.react.uimanager.SimpleViewManager;
 import com.facebook.react.uimanager.ThemedReactContext;
 
+import java.util.Locale;
+
 
 public class FBLoginButtonManager extends SimpleViewManager<RCTLoginButton> {
 
@@ -54,12 +56,12 @@ public RCTLoginButton createViewInstance(ThemedReactContext context) {
 
     @ReactProp(name = "loginBehaviorAndroid")
     public void setLoginBehavior(RCTLoginButton loginButton, @Nullable String loginBehavior) {
-        loginButton.setLoginBehavior(LoginBehavior.valueOf(loginBehavior.toUpperCase()));
+        loginButton.setLoginBehavior(LoginBehavior.valueOf(loginBehavior.toUpperCase(Locale.ROOT)));
     }
 
     @ReactProp(name = "defaultAudience")
     public void setDefaultAudience(RCTLoginButton loginButton, @Nullable String defaultAudience) {
-        loginButton.setDefaultAudience(DefaultAudience.valueOf(defaultAudience.toUpperCase()));
+        loginButton.setDefaultAudience(DefaultAudience.valueOf(defaultAudience.toUpperCase(Locale.ROOT)));
     }
 
     @ReactProp(name = "permissions")
diff --git a/android/src/main/java/com/facebook/reactnative/androidsdk/FBLoginManagerModule.java b/android/src/main/java/com/facebook/reactnative/androidsdk/FBLoginManagerModule.java
index ce6da614..2a08de69 100644
--- a/android/src/main/java/com/facebook/reactnative/androidsdk/FBLoginManagerModule.java
+++ b/android/src/main/java/com/facebook/reactnative/androidsdk/FBLoginManagerModule.java
@@ -37,6 +37,7 @@
 import com.facebook.react.bridge.WritableMap;
 import com.facebook.react.module.annotations.ReactModule;
 
+import java.util.Locale;
 import java.util.Set;
 
 /**
@@ -85,7 +86,7 @@ public String getName() {
      */
     @ReactMethod
     public void getLoginBehavior(Promise promise) {
-        promise.resolve(LoginManager.getInstance().getLoginBehavior().name().toLowerCase());
+        promise.resolve(LoginManager.getInstance().getLoginBehavior().name().toLowerCase(Locale.ROOT));
     }
 
     /**
@@ -96,7 +97,7 @@ public void getLoginBehavior(Promise promise) {
      */
     @ReactMethod
     public void setLoginBehavior(String loginBehaviorString) {
-        LoginBehavior loginBehavior = LoginBehavior.valueOf(loginBehaviorString.toUpperCase());
+        LoginBehavior loginBehavior = LoginBehavior.valueOf(loginBehaviorString.toUpperCase(Locale.ROOT));
         LoginManager.getInstance().setLoginBehavior(loginBehavior);
     }
 
@@ -106,7 +107,7 @@ public void setLoginBehavior(String loginBehaviorString) {
      */
     @ReactMethod
     public void getDefaultAudience(Promise promise) {
-        promise.resolve(LoginManager.getInstance().getDefaultAudience().name().toLowerCase());
+        promise.resolve(LoginManager.getInstance().getDefaultAudience().name().toLowerCase(Locale.ROOT));
     }
 
     /**
@@ -116,7 +117,7 @@ public void getDefaultAudience(Promise promise) {
      */
     @ReactMethod
     public void setDefaultAudience(String defaultAudienceString) {
-        DefaultAudience defaultAudience = DefaultAudience.valueOf(defaultAudienceString.toUpperCase());
+        DefaultAudience defaultAudience = DefaultAudience.valueOf(defaultAudienceString.toUpperCase(Locale.ROOT));
         LoginManager.getInstance().setDefaultAudience(defaultAudience);
     }
 
diff --git a/android/src/main/java/com/facebook/reactnative/androidsdk/FBShareDialogModule.java b/android/src/main/java/com/facebook/reactnative/androidsdk/FBShareDialogModule.java
index 42a3bc81..2871c402 100644
--- a/android/src/main/java/com/facebook/reactnative/androidsdk/FBShareDialogModule.java
+++ b/android/src/main/java/com/facebook/reactnative/androidsdk/FBShareDialogModule.java
@@ -30,6 +30,8 @@
 import com.facebook.share.Sharer;
 import com.facebook.share.widget.ShareDialog;
 
+import java.util.Locale;
+
 @ReactModule(name = FBShareDialogModule.NAME)
 public class FBShareDialogModule extends FBSDKCallbackManagerBaseJavaModule {
 
@@ -96,7 +98,7 @@ public void show(ReadableMap shareContent, final Promise promise) {
 
     @ReactMethod
     public void setMode(String mode) {
-        mShareDialogMode = ShareDialog.Mode.valueOf(mode.toUpperCase());
+        mShareDialogMode = ShareDialog.Mode.valueOf(mode.toUpperCase(Locale.ROOT));
     }
 
     @ReactMethod
diff --git a/android/src/main/java/com/facebook/reactnative/androidsdk/Utility.java b/android/src/main/java/com/facebook/reactnative/androidsdk/Utility.java
index 00f17bc3..fd84972d 100644
--- a/android/src/main/java/com/facebook/reactnative/androidsdk/Utility.java
+++ b/android/src/main/java/com/facebook/reactnative/androidsdk/Utility.java
@@ -47,6 +47,7 @@
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
+import java.util.Locale;
 import java.util.Set;
 
 import androidx.annotation.Nullable;
@@ -145,12 +146,12 @@ public static GameRequestContent buildGameRequestContent(ReadableMap gameRequest
         String actionType = getValueOrNull(gameRequestContentMap, "actionType");
         if (actionType != null) {
             gameRequestContentBuilder.setActionType(
-                    GameRequestContent.ActionType.valueOf(actionType.toUpperCase()));
+                    GameRequestContent.ActionType.valueOf(actionType.toUpperCase(Locale.ROOT)));
         }
         String filters = getValueOrNull(gameRequestContentMap, "filters");
         if (filters != null) {
             gameRequestContentBuilder.setFilters(
-                    GameRequestContent.Filters.valueOf(filters.toUpperCase()));
+                    GameRequestContent.Filters.valueOf(filters.toUpperCase(Locale.ROOT)));
         }
         gameRequestContentBuilder.setMessage(gameRequestContentMap.getString("message"));
         if (gameRequestContentMap.hasKey("recipients")) {