diff --git a/com.unity.ml-agents/CHANGELOG.md b/com.unity.ml-agents/CHANGELOG.md
index d0b4d9dd15..8e17cc71f0 100755
--- a/com.unity.ml-agents/CHANGELOG.md
+++ b/com.unity.ml-agents/CHANGELOG.md
@@ -6,7 +6,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to
 [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [4.0.1] - 2025-12-04
 ### Minor Changes
 #### com.unity.ml-agents (C#)
 - Fixed tensor indexing to use correct CHW layout (#6239)
diff --git a/com.unity.ml-agents/Documentation~/Reference-Support.md b/com.unity.ml-agents/Documentation~/Reference-Support.md
index 922e65c79d..8c891229f9 100644
--- a/com.unity.ml-agents/Documentation~/Reference-Support.md
+++ b/com.unity.ml-agents/Documentation~/Reference-Support.md
@@ -3,10 +3,11 @@
 The Reference & Support section contains essential documentation for ongoing ML-Agents development.
 
 
-| **Resource**                         | **Description**                                              |
-|--------------------------------------|--------------------------------------------------------------|
-| [FAQ](FAQ.md)                        | Frequently asked questions and common issues with solutions. |
-| [Limitations](Limitations.md)        | Known limitations and constraints of the ML-Agents Toolkit.  |
-| [Migrating](Migrating.md)            | Migration guides for updating between ML-Agents versions.    |
-| [Versioning](Versioning.md)          | Information about ML-Agents versioning and release notes.    |
-| [ML-Agents Glossary](Glossary.md)    | Glossary of terms and concepts used in ML-Agents.            |
+| **Resource**                               | **Description**                                              |
+|--------------------------------------------|--------------------------------------------------------------|
+| [FAQ](FAQ.md)                              | Frequently asked questions and common issues with solutions. |
+| [Limitations](Limitations.md)              | Known limitations and constraints of the ML-Agents Toolkit.  |
+| [Migrating](Migrating.md)                  | Migration guides for updating between ML-Agents versions.    |
+| [Versioning](Versioning.md)                | Information about ML-Agents versioning and release notes.    |
+| [ML-Agents Glossary](Glossary.md)          | Glossary of terms and concepts used in ML-Agents.            |
+| [Contribution guidelines](CONTRIBUTING.md) | How to Contribute to ML-Agents.                              |
diff --git a/com.unity.ml-agents/Runtime/Academy.cs b/com.unity.ml-agents/Runtime/Academy.cs
index 3cdc15f64c..612caa8352 100644
--- a/com.unity.ml-agents/Runtime/Academy.cs
+++ b/com.unity.ml-agents/Runtime/Academy.cs
@@ -107,7 +107,7 @@ public class Academy : IDisposable
         /// Unity package version of com.unity.ml-agents.
         /// This must match the version string in package.json and is checked in a unit test.
         /// </summary>
-        internal const string k_PackageVersion = "4.0.0";
+        internal const string k_PackageVersion = "4.0.1";
 
         const int k_EditorTrainingPort = 5004;