diff --git a/CHANGELOG b/CHANGELOG.md
similarity index 95%
rename from CHANGELOG
rename to CHANGELOG.md
index 3b68c9c5..8e30eadb 100644
--- a/CHANGELOG
+++ b/CHANGELOG.md
@@ -18,4 +18,4 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ### Security
 
-[Unreleased 3.x]: https://github.com/opensearch-project/job-scheduler/compare/3.0...main
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+[Unreleased 3.x]: https://github.com/opensearch-project/job-scheduler/compare/3.3...main
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