diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c56882829..f299533f43 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -39,6 +39,7 @@ This section is for maintaining a changelog for all breaking changes for the cli
 ## [Unreleased 2.x]
 
 ### Added
+- Add `hashCode` and `equals` implementations ([#312](https://github.com/opensearch-project/opensearch-java/pull/312)).
 
 ### Dependencies
 - Bumps `org.junit:junit-bom` from 5.10.3 to 5.11.0