diff --git a/cpp/CHANGELOG.md b/cpp/CHANGELOG.md
index d599b5256c..74b6703a28 100644
--- a/cpp/CHANGELOG.md
+++ b/cpp/CHANGELOG.md
@@ -26,6 +26,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-467 - mysql db test failed
 - MS-470 - Drop index success, which table not created
 - MS-471 - code coverage run failed
+- MS-493 - Knowhere unittest crash
 
 ## Improvement
 - MS-327 - Clean code for milvus
@@ -84,6 +85,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-455 - Distribute tasks by minimal cost in scheduler
 - MS-460 - Put transport speed as weight when choosing neighbour to execute task
 - MS-459 - Add cache for pick function in tasktable
+- MS-476 - Improve search performance
 - MS-482 - Change search stream transport to unary in grpc
 - MS-487 - Define metric type in CreateTable
 - MS-488 - Improve code format in scheduler