diff --git a/Libraries/src/Amazon.Lambda.RuntimeSupport/Amazon.Lambda.RuntimeSupport.csproj b/Libraries/src/Amazon.Lambda.RuntimeSupport/Amazon.Lambda.RuntimeSupport.csproj
index 052425369..018b042fd 100644
--- a/Libraries/src/Amazon.Lambda.RuntimeSupport/Amazon.Lambda.RuntimeSupport.csproj
+++ b/Libraries/src/Amazon.Lambda.RuntimeSupport/Amazon.Lambda.RuntimeSupport.csproj
@@ -35,7 +35,7 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
-    <PackageReference Include="System.Text.Json" Version="6.0.0" />
+    <PackageReference Include="System.Text.Json" Version="6.0.10" />
   </ItemGroup>	
 
   <ItemGroup>
diff --git a/Libraries/src/Amazon.Lambda.Serialization.Json/Amazon.Lambda.Serialization.Json.csproj b/Libraries/src/Amazon.Lambda.Serialization.Json/Amazon.Lambda.Serialization.Json.csproj
index 1090ea808..803e971b0 100644
--- a/Libraries/src/Amazon.Lambda.Serialization.Json/Amazon.Lambda.Serialization.Json.csproj
+++ b/Libraries/src/Amazon.Lambda.Serialization.Json/Amazon.Lambda.Serialization.Json.csproj
@@ -9,7 +9,7 @@
     <AssemblyName>Amazon.Lambda.Serialization.Json</AssemblyName>
     <PackageId>Amazon.Lambda.Serialization.Json</PackageId>
     <PackageTags>AWS;Amazon;Lambda</PackageTags>
-    <VersionPrefix>2.2.3</VersionPrefix>
+    <VersionPrefix>2.2.4</VersionPrefix>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/Libraries/src/Amazon.Lambda.Serialization.Json/JsonSerializer.cs b/Libraries/src/Amazon.Lambda.Serialization.Json/JsonSerializer.cs
index 77c23e1e6..0555e2f9c 100644
--- a/Libraries/src/Amazon.Lambda.Serialization.Json/JsonSerializer.cs
+++ b/Libraries/src/Amazon.Lambda.Serialization.Json/JsonSerializer.cs
@@ -94,7 +94,7 @@ public void Serialize<T>(T response, Stream responseStream)
         {
             try
             {
-                if (debug)
+                if (debug && response != null)
                 {
                     using (StringWriter debugWriter = new StringWriter())
                     {
diff --git a/Libraries/src/Amazon.Lambda.Serialization.SystemTextJson/AbstractLambdaJsonSerializer.cs b/Libraries/src/Amazon.Lambda.Serialization.SystemTextJson/AbstractLambdaJsonSerializer.cs
index 0f27cf3fa..2656c535b 100644
--- a/Libraries/src/Amazon.Lambda.Serialization.SystemTextJson/AbstractLambdaJsonSerializer.cs
+++ b/Libraries/src/Amazon.Lambda.Serialization.SystemTextJson/AbstractLambdaJsonSerializer.cs
@@ -48,7 +48,7 @@ public void Serialize<T>(T response, Stream responseStream)
         {
             try
             {
-                if (_debug)
+                if (_debug && response != null)
                 {
                     using (var debugStream = new MemoryStream())
                     using (var utf8Writer = new Utf8JsonWriter(debugStream, WriterOptions))
diff --git a/Libraries/src/Amazon.Lambda.Serialization.SystemTextJson/Amazon.Lambda.Serialization.SystemTextJson.csproj b/Libraries/src/Amazon.Lambda.Serialization.SystemTextJson/Amazon.Lambda.Serialization.SystemTextJson.csproj
index e6cb09dd6..84dfc7a7e 100644
--- a/Libraries/src/Amazon.Lambda.Serialization.SystemTextJson/Amazon.Lambda.Serialization.SystemTextJson.csproj
+++ b/Libraries/src/Amazon.Lambda.Serialization.SystemTextJson/Amazon.Lambda.Serialization.SystemTextJson.csproj
@@ -9,7 +9,7 @@
         <AssemblyName>Amazon.Lambda.Serialization.SystemTextJson</AssemblyName>
         <PackageId>Amazon.Lambda.Serialization.SystemTextJson</PackageId>
         <PackageTags>AWS;Amazon;Lambda</PackageTags>
-        <VersionPrefix>2.4.3</VersionPrefix>
+        <VersionPrefix>2.4.4</VersionPrefix>
 		<PackageReadmeFile>README.md</PackageReadmeFile>
     </PropertyGroup>
 	<ItemGroup>
diff --git a/Libraries/src/Amazon.Lambda.Serialization.SystemTextJson/LambdaJsonSerializer.cs b/Libraries/src/Amazon.Lambda.Serialization.SystemTextJson/LambdaJsonSerializer.cs
index bc162f227..dae777b54 100644
--- a/Libraries/src/Amazon.Lambda.Serialization.SystemTextJson/LambdaJsonSerializer.cs
+++ b/Libraries/src/Amazon.Lambda.Serialization.SystemTextJson/LambdaJsonSerializer.cs
@@ -95,7 +95,7 @@ public void Serialize<T>(T response, Stream responseStream)
         {
             try
             {
-                if (_debug)
+                if (_debug && response != null)
                 {
                     using (var debugWriter = new StringWriter())
                     using (var utf8Writer = new Utf8JsonWriter(responseStream, WriterOptions))
diff --git a/Libraries/test/Amazon.Lambda.Annotations.SourceGenerators.Tests/Amazon.Lambda.Annotations.SourceGenerators.Tests.csproj b/Libraries/test/Amazon.Lambda.Annotations.SourceGenerators.Tests/Amazon.Lambda.Annotations.SourceGenerators.Tests.csproj
index 8e8f5700a..42794db74 100644
--- a/Libraries/test/Amazon.Lambda.Annotations.SourceGenerators.Tests/Amazon.Lambda.Annotations.SourceGenerators.Tests.csproj
+++ b/Libraries/test/Amazon.Lambda.Annotations.SourceGenerators.Tests/Amazon.Lambda.Annotations.SourceGenerators.Tests.csproj
@@ -16,7 +16,7 @@
         <PackageReference Include="Moq" Version="4.18.4" />
         <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
         <PackageReference Include="System.Memory" Version="4.5.5" />
-        <PackageReference Include="System.Text.Json" Version="8.0.4" />
+        <PackageReference Include="System.Text.Json" Version="8.0.5" />
         <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
           <PrivateAssets>all</PrivateAssets>
           <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/Libraries/test/TestServerlessApp/TestServerlessApp.csproj b/Libraries/test/TestServerlessApp/TestServerlessApp.csproj
index 263e0b650..a790ac481 100644
--- a/Libraries/test/TestServerlessApp/TestServerlessApp.csproj
+++ b/Libraries/test/TestServerlessApp/TestServerlessApp.csproj
@@ -19,7 +19,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="6.0.0" />
-    <PackageReference Include="System.Text.Json" Version="8.0.4" />
+    <PackageReference Include="System.Text.Json" Version="8.0.5" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\src\Amazon.Lambda.Annotations.SourceGenerator\Amazon.Lambda.Annotations.SourceGenerator.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
diff --git a/RELEASE.CHANGELOG.md b/RELEASE.CHANGELOG.md
index 7045daf92..e72dde8b8 100644
--- a/RELEASE.CHANGELOG.md
+++ b/RELEASE.CHANGELOG.md
@@ -1,3 +1,7 @@
+### Release 2024-10-15
+* **AWSLambdaPSCore PowerShell Module (4.0.3.0)**
+  * Update default version of Microsoft.PowerShell.SDK to 7.4.5
+
 ### Release 2024-09-30
 * **AWSLambdaPSCore PowerShell Module (4.0.2.0)**
   * Update PowerShell Lambda blueprints to reference the latest Amazon.Lambda.PowerShellHost and Amazon.Lambda.Core packages.