diff --git a/CHANGELOG.md b/CHANGELOG.md
index 02481b144..b6ffcea2c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ See the [releases page](https://github.com/github/codeql-action/releases) for th
 
 ## [UNRELEASED]
 
-No user facing changes.
+- Update default CodeQL bundle version to 2.21.2. [#2872](https://github.com/github/codeql-action/pull/2872)
 
 ## 3.28.16 - 23 Apr 2025