diff --git a/README.md b/README.md
index 3c949195a..57b5b35a5 100644
--- a/README.md
+++ b/README.md
@@ -366,3 +366,5 @@ it will only happen in a minor or major version release.
 ## License
 
 This project is licensed under the [Apache License 2.0](https://github.com/10gen/mongo-rust-driver/blob/main/LICENSE).
+
+This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit (http://www.openssl.org/).