Add documentation domain name announcement
diff --git a/README.md b/README.md
index fca78cefe3b..0f7487d8c49 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,9 @@
 [![pre-commit](https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit&logoColor=white)](https://pre-commit.com/) [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 
+## Important notice
+
+### Due to issues with the domain registration, the documentation has been moved to [https://www.gymlibrary.dev/](https://www.gymlibrary.dev/) as opposed to the old .ml address.
+
 ## Gym
 
 Gym is an open source Python library for developing and comparing reinforcement learning algorithms by providing a standard API to communicate between learning algorithms and environments, as well as a standard set of environments compliant with that API. Since its release, Gym's API has become the field standard for doing this.

We need to actively make people aware of the address change to avoid potential security issues