diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6ae38b4c..2af46a82 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@ 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))
+- Added sync and async sample that uses `search_after` parameter ([859](https://github.com/opensearch-project/opensearch-py/pull/859))
 ### Updated APIs
 ### Changed
 ### Deprecated