diff --git a/src/sample-dictionary-post/Program.fs b/src/sample-dictionary-post/Program.fs
index 888f31f..e655492 100644
--- a/src/sample-dictionary-post/Program.fs
+++ b/src/sample-dictionary-post/Program.fs
@@ -21,14 +21,13 @@ type Message =
         Text : string
     }
 
+type [<CLIMutable>] InventoryItem =
+    { Name: string
+      MoneyValue: int }
 [<CLIMutable>] // fix MissingMethodException: No parameterless constructor defined for this object.
 type AdventurerDto = 
-    {
-        name: string
-        inventory: Dictionary<string,int>
-        // string = item id guid
-        // int = how many of that item
-    }
+    { Name: string
+      Inventory: InventoryItem array }
 
 // ---------------------------------
 // Views
@@ -64,13 +63,10 @@ module Views =
                 let formFields = 
                     [
                         input [_type "text"; _name "name"; _value "" ;_placeholder "This will bind to 'name' value"]
-                        // If I use the below 2 i get Missing value for required property inventory.
-                        //input [_type "text"; _name "inventory[key]"; _value "itemid123";_placeholder "This will be the inventory dictionary key"]
-                        //input [_type "text"; _name "inventory[value]"; _value "1";_placeholder "This will be the inventory dictionary value"]
-                        
-                        // if I do it as a single line i get
-                        // ArgumentException: Object of type 'System.String' cannot be converted to type 'System.Collections.Generic.Dictionary`2[System.String,System.Int32]'.
-                        input [_type "text"; _name "inventory[]"; _value "itemid123,2";_placeholder "This will be the inventory dictionary key + value"]
+                        br []
+                        input [_type "text";   _name "inventory[0].name" ]
+                        input [_type "number"; _name "inventory[0].moneyValue" ]
+                        br []
                         input [_type "submit"; _value "Submit"]
                     ]
                 form [ _method "post"; _action "/createAdventurer"] formFields
@@ -131,10 +127,10 @@ let configureCors (builder : CorsPolicyBuilder) =
            |> ignore
 
 let configureApp (app : IApplicationBuilder) =
-    let env = app.ApplicationServices.GetService<IHostingEnvironment>()
-    (match env.IsDevelopment() with
-    | true  -> app.UseDeveloperExceptionPage()
-    | false -> app.UseGiraffeErrorHandler errorHandler)
+    let env = app.ApplicationServices.GetService<IWebHostEnvironment>()
+    (match env.EnvironmentName with
+    | "Development"  -> app.UseDeveloperExceptionPage()
+    | _ -> app.UseGiraffeErrorHandler errorHandler)
         .UseHttpsRedirection()
         .UseCors(configureCors)
         .UseStaticFiles()
diff --git a/src/sample-dictionary-post/sample-dictionary-post.fsproj b/src/sample-dictionary-post/sample-dictionary-post.fsproj
index 0b7b4f4..84cd514 100644
--- a/src/sample-dictionary-post/sample-dictionary-post.fsproj
+++ b/src/sample-dictionary-post/sample-dictionary-post.fsproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
     <DebugType>portable</DebugType>
     <AssemblyName>sample_dictionary_post</AssemblyName>
     <OutputType>Exe</OutputType>
@@ -9,8 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.App" Version="2.1.*" />
-    <PackageReference Include="Giraffe" Version="3.4.*" />
+    <PackageReference Include="Giraffe" Version="4.1.*" />
     <PackageReference Include="TaskBuilder.fs" Version="2.1.*" />
   </ItemGroup>