diff --git a/cpp/CHANGELOG.md b/cpp/CHANGELOG.md
index 595bd8b4ec..94972363fa 100644
--- a/cpp/CHANGELOG.md
+++ b/cpp/CHANGELOG.md
@@ -21,3 +21,4 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-1 - Add CHANGELOG.md
 - MS-4 - Refactor the vecwise_engine code structure
 - MS-20 - Clean Code Part 1
+- MS-30 - Use faiss v1.5.2