CHANGELOG.md in right_on-0.3.0 vs CHANGELOG.md in right_on-0.4.0

@@ -3,9 +3,22 @@
 This project adheres to [Semantic Versioning](http://semver.org/).  
 This changelog adheres to [Keep a CHANGELOG](http://keepachangelog.com/).  
 
 ## Unreleased
 
+## 0.4.0
+
+### Improved
+- Improve tests for RightOn::ByGroup
+- Internal improvement of RightOn::ByGroup
+- Internal extraction of 'allowed?' feature for failure message
+- CanCanRight functionality merged into RightOn
+- Cleanup of CanCanRight/RightOn merge
+
+### Fixed
+- [TT-3352] Ensure roles currently in use cannot be deleted
+- Also dropped rails 3 support due to above
+
 ## 0.3.0
 
 ### Fixed
 - Caching of rights in memory (causing tenant issues)