diff --git a/CHANGELOG.md b/CHANGELOG.md
index 267b4e557..a8880f37a 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 [2.27.1](https://github.com/github/codeql-action/releases/tag/codeql-bundle-v2.27.1). [#4160](https://github.com/github/codeql-action/pull/4160)
 
 ## 4.38.1 - 18 Sept 2026