diff --git a/ChangeLog.md b/ChangeLog.md
index ad24064..8422085 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -6,7 +6,7 @@ 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]
+## [Unreleased][unreleased]
 
 ## [v1.0.0] - 2021-06-01
 ### Added
@@ -39,3 +39,10 @@ Versioning](http://semver.org/spec/v2.0.0.html).
 ### Added
 - Telemetry support
 - This ChangeLog!
+
+[unreleased]: https://github.com/Learnosity/learnosity-sdk-php/compare/v1.0.0...HEAD
+[v1.0.0]: https://github.com/Learnosity/learnosity-sdk-php/compare/v0.10.3...v1.0.0
+[v0.10.3]: https://github.com/Learnosity/learnosity-sdk-php/compare/v0.10.2...v0.10.3
+[v0.10.2]: https://github.com/Learnosity/learnosity-sdk-php/compare/v0.10.1...v0.10.2
+[v0.10.1]: https://github.com/Learnosity/learnosity-sdk-php/compare/v0.10.0...v0.10.1
+[v0.10.0]: https://github.com/Learnosity/learnosity-sdk-php/compare/v0.9.2...v0.10.0