diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4efd51d3..5e3b6774 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Added index lifecycle guide ([#362](https://github.com/opensearch-project/opensearch-py/pull/362))
 - Added 'point in time' APIs to the pyi files in sync and async client ([#378](https://github.com/opensearch-project/opensearch-py/pull/378))
 - Added MacOS and Windows CI workflows ([#390](https://github.com/opensearch-project/opensearch-py/pull/390))
+- Compatibility with OpenSearch 2.1.0 - 2.6.0 ([#381](https://github.com/opensearch-project/opensearch-py/pull/381))
 ### Changed
 - Upgrading pytest-asyncio to latest version - 0.21.0 ([#339](https://github.com/opensearch-project/opensearch-py/pull/339))
 ### Deprecated
diff --git a/COMPATIBILITY.md b/COMPATIBILITY.md
index 59d8529b..bae1cafb 100644
--- a/COMPATIBILITY.md
+++ b/COMPATIBILITY.md
@@ -9,8 +9,9 @@ The below matrix shows the compatibility of the [`opensearch-py`](https://pypi.o
 | --- | --- | --- |
 | 1.0.0 | 1.0.0-1.2.4 | |
 | 1.1.0 | 1.3.0-1.3.7 | |
-| 2.0.0 | 1.0.0-2.4.1 | client works against Opensearch Version 1.x as long as features removed in 2.0 are not used |
-| 2.0.1 | 1.0.0-2.4.1 | client works against Opensearch Version 1.x as long as features removed in 2.0 are not used |
+| 2.0.x | 1.0.0-2.6.0 | client works against Opensearch Version 1.x as long as features removed in 2.0 are not used |
+| 2.1.x | 1.0.0-2.6.0 | client works against Opensearch Version 1.x as long as features removed in 2.0 are not used |
+| 2.2.0 | 1.0.0-2.6.0 | client works against Opensearch Version 1.x as long as features removed in 2.0 are not used |
 
 ## Upgrading