diff --git a/index.md b/index.md
index b7c29db8..836ea22d 100755
--- a/index.md
+++ b/index.md
@@ -121,3 +121,8 @@ See [opensearch.org/javadocs/](https://opensearch.org/javadocs/).
 [OpenSearch](https://opensearch.org) is supported by Amazon Web Services. All components are available under the [Apache License, Version 2.0](https://www.apache.org/licenses/LICENSE-2.0.html) on [GitHub](https://github.com/opensearch-project/).
 
 The project welcomes GitHub issues, bug fixes, features, plugins, documentation---anything at all. To get involved, see [Contributing](https://opensearch.org/source.html) on the OpenSearch website.
+
+
+---
+
+<small>OpenSearch includes certain Apache-licensed Elasticsearch code from Elasticsearch B.V. and other source code. Elasticsearch B.V. is not the source of that other source code. ELASTICSEARCH is a registered trademark of Elasticsearch B.V.</small>
\ No newline at end of file