diff --git a/CHANGELOG.md b/CHANGELOG.md
index 04f9c23..ef01d5e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
+## [Unreleased]
+
 ## [0.3.1]
 
 ### Fixed
@@ -11,3 +13,6 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Axios version to `0.18.1` due the CVE-2019-10742
 - Fix the `subject` attribute unmarshal error: issue
 [#32](https://github.com/cloudevents/sdk-javascript/issues/32)
+
+[Unreleased]: https://github.com/olivierlacan/keep-a-changelog/compare/v0.3.1...HEAD
+[0.3.1]: https://github.com/olivierlacan/keep-a-changelog/compare/v0.3.0...v0.3.1