diff --git a/RELEASE.CHANGELOG.md b/RELEASE.CHANGELOG.md
index eb32b7045..808a1bbd5 100644
--- a/RELEASE.CHANGELOG.md
+++ b/RELEASE.CHANGELOG.md
@@ -4,6 +4,12 @@
   * Correctly populate the role property in CloudFormation template
   * Copy XML documentation for Amazon.Lambda.Annotations into nupkg to drive IntelliSense
   * Add more detail to the Lambda Annotations README.md
+* **Amazon.Lambda.TestTool-3.1 (0.12.4)**
+  * Pull request [#1308](https://github.com/aws/aws-lambda-dotnet/pull/1308) fixing serialization of messages while monitoring dead letter queue. Thanks [William Keller](https://github.com/william-keller) 
+* **Amazon.Lambda.TestTool-5.0 (0.12.4)**
+  * Pull request [#1308](https://github.com/aws/aws-lambda-dotnet/pull/1308) fixing serialization of messages while monitoring dead letter queue. Thanks [William Keller](https://github.com/william-keller) 
+* **Amazon.Lambda.TestTool-6.0 (0.12.4)**
+  * Pull request [#1308](https://github.com/aws/aws-lambda-dotnet/pull/1308) fixing serialization of messages while monitoring dead letter queue. Thanks [William Keller](https://github.com/william-keller) 
 
 ### Release 2022-08-29
 * **Amazon.Lambda.Annotations (0.7.0-preview)**