diff --git a/CHANGELOG.md b/CHANGELOG.md
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--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased 3.0](https://github.com/opensearch-project/neural-search/compare/2.x...HEAD)
 ### Features
+- Add rerank processor interface and ml-commons reranker ([#494](https://github.com/opensearch-project/neural-search/pull/494))
 ### Enhancements
 ### Bug Fixes
 - Fix async actions are left in neural_sparse query ([#438](https://github.com/opensearch-project/neural-search/pull/438))