diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9b0db817..6ce5d25e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,6 +26,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Replaced Smithy with a native OpenAPI spec ([#189](https://github.com/opensearch-project/opensearch-api-specification/issues/189))
 - Refactored spec tester internals to improve reusability ([#302](https://github.com/opensearch-project/opensearch-api-specification/pull/302))
 - Renamed `main` release tag to `main-latest` ([#321](https://github.com/opensearch-project/opensearch-api-specification/pull/321))
+- Replaced usages of `Opensearch` with `OpenSearch` ([#335](https://github.com/opensearch-project/opensearch-api-specification/pull/335))
 
 ### Deprecated