diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0c6596a9..6ae38b4c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
 ## [Unreleased]
 ### Added
+- Added option to pass custom headers to 'AWSV4SignerAsyncAuth' ([863](https://github.com/opensearch-project/opensearch-py/pull/863))
 ### Updated APIs
 ### Changed
 ### Deprecated