diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -7,6 +7,7 @@
 ## Purpose
 
 This provider allows you to configure Mikrotik routers using [old API](https://help.mikrotik.com/docs/display/ROS/API) or [REST API](https://help.mikrotik.com/docs/display/ROS/REST+API), using or not using TLS.
+Compatibility testing is only performed within ROS version 7.x.
 
 From version 1.0.0, the provider has been rewritten by [vaerh](https://github.com/vaerh), and their [fork](https://github.com/vaerh/terraform-provider-routeros) has now been merged. This version drastically improves adding new endpoints to the provider, enabling significantly easier development. [vaerh](https://github.com/vaerh) has been added as a maintainer to this project.