diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index 391edd84d92..aef4e4897f8 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -25,6 +25,7 @@ Yii Framework 2 Change Log
 - Enh #20295: Add an ability to have wildcards in `yii\log\Target::$maskVars` array (xcopy)
 - Bug #20296: Fix broken enum test (briedis)
 - Bug #20300: Clear stat cache in `FileCache::setValue()` (rob006)
+- Enh #20306: Add new `yii\helpers\ArrayHelper::flatten()` method
 
 2.0.51 July 18, 2024
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