diff --git a/CHANGELOG.md b/CHANGELOG.md
index 825c32f..ca563bb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1 +1,14 @@
 # Changelog
+All notable changes to this project will be documented in this file.
+
+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]
+
+## v1.0.0 - 2018-06-12
+
+Initial release of the library.
+
+
+[Unreleased]: https://github.com/gridonic/swisscom-easypay/compare/v1.0.0...HEAD