diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7083cc12eb..5c7740de26 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -30,6 +30,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - \#532 - assigin value to `table_name` from confest shell
 - \#533 - NSG build failed with MetricType Inner Product
 - \#543 - client raise exception in shards when search results is empty
+- \#497 - CPU-version search performance decreased 
 
 ## Feature
 - \#12 - Pure CPU version for Milvus