diff --git a/CHANGELOG.md b/CHANGELOG.md
index 680e9af40..3c8a50c22 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+- Updated HTML of the debug template [#599](https://github.com/smarty-php/smarty/pull/599)
+
 ## [4.1.1] - 2022-05-17
 
 ### Security