diff --git a/README.md b/README.md
index 16d21a5..6d0ae2b 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,3 @@
 # harbian-audit
-Hardened Debian GNU/Linux distro auditing.
+Hardened Debian GNU/Linux distro auditing. 
+The main test environment is in debian 9, and other versions are not fully tested.