diff --git a/cpp/CHANGELOG.md b/cpp/CHANGELOG.md
index 67a17013f4..9c5fc5b7f6 100644
--- a/cpp/CHANGELOG.md
+++ b/cpp/CHANGELOG.md
@@ -74,6 +74,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-442 - Merge Knowhere
 - MS-445 - Rename CopyCompleted to LoadCompleted
 - MS-451 - Update server_config.template file, set GPU compute default
+- MS-455 - Distribute tasks by minimal cost in scheduler
 
 ## New Feature
 - MS-343 - Implement ResourceMgr