diff --git a/CHANGELOG.md b/CHANGELOG.md
index b3d0ac2c5..094ced112 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,7 @@ Note that the only difference between `v2` and `v3` of the CodeQL Action is the
 
 ## [UNRELEASED]
 
-No user facing changes.
+- Update default CodeQL bundle version to 2.15.5. [#2047](https://github.com/github/codeql-action/pull/2047)
 
 ## 3.22.11 - 13 Dec 2023