diff --git a/CHANGELOG.md b/CHANGELOG.md
index cfecf876d9..89abced7fc 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 2.18.4. [#2471](https://github.com/github/codeql-action/pull/2471)
 
 ## 3.26.6 - 29 Aug 2024