diff --git a/CHANGELOG.md b/CHANGELOG.md
index 42d5b8978f..7695704237 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - \#127 - Support new Index type IVFPQ
 - \#226 - Experimental shards middleware for Milvus
 - \#346 - Support build index with multiple gpu
+- \#420 - Update shards merge part to match v0.5.3
 
 ## Improvement
 - \#275 - Rename C++ SDK IndexType