diff --git a/CHANGELOG.md b/CHANGELOG.md
index 748ab83..f5b6a97 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,11 +5,12 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
+
+## [4.0.0] - 2017-12-06
 ### Changed
 - Migrated Unity to Unity.Container 5.0.0
 - Migrated to dotnet sdk
 
-
 ## [3.0.0] - 2017-08-18
 ### Changed
 - Updated project urls
@@ -31,7 +32,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Added
 - Initial release from @devtrends
 
-[Unreleased]: https://github.com/ViceIce/unity.wcf/compare/v3.0.0...HEAD
+[Unreleased]: https://github.com/ViceIce/unity.wcf/compare/v4.0.0...HEAD
+[4.0.0]: https://github.com/ViceIce/unity.wcf/compare/v3.0.0...v4.0.0
 [3.0.0]: https://github.com/ViceIce/unity.wcf/compare/v2.0.0...v3.0.0
 [2.0.0]: https://github.com/ViceIce/unity.wcf/compare/v1.1.0...v2.0.0
 [1.1.0]: https://github.com/ViceIce/unity.wcf/compare/v1.0.0...v1.1.0