diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6c6d1aa5..1b0b42f6 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]
 
+### Fixed
+- Fixed problems with smarty_mb_str_replace [#549](https://github.com/smarty-php/smarty/issues/549)
+
 ## [3.1.45] - 2022-05-17
 
 ### Security