diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1067cfd..34863f5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
 # Changelog
+All notable changes to this project will be documented in this file.
 
-> TBD
+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](https://github.com/stefanzweifel/git-auto-commit-action/compare/v1.0.0...HEAD)
+
+### Added
+
+- Add Core Logic for Action