diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0f5b6c1e9..1462d2189 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 See the [releases page](https://github.com/github/codeql-action/releases) for the relevant changes to the CodeQL CLI and language packs.
 
-## [UNRELEASED]
+## 2.21.5 - 28 Aug 2023
 
 - Update default CodeQL bundle version to 2.14.3. [#1845](https://github.com/github/codeql-action/pull/1845)
 - Fixed a bug in CodeQL Action 2.21.3 onwards that affected beta support for [Project Lombok](https://projectlombok.org/) when analyzing Java. The environment variable `CODEQL_EXTRACTOR_JAVA_RUN_ANNOTATION_PROCESSORS` will now be respected if it was manually configured in the workflow. [#1844](https://github.com/github/codeql-action/pull/1844)