diff --git a/CHANGELOG.md b/CHANGELOG.md
index e9ece6114..361be69ab 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 2.23.9. [#3393](https://github.com/github/codeql-action/pull/3393)
 
 ## 4.31.9 - 16 Dec 2025