diff --git a/README.md b/README.md
index f264ef8..ab013ab 100644
--- a/README.md
+++ b/README.md
@@ -12,8 +12,14 @@ Table of contents
 
 NOTA BENE
 =================
-I've tested the playbooks mainly on Debian 9,10,11 and ubuntu (server) 18.04 LTS running as root,
-on Ubuntu (Desktop) 19.04 running ad user.
+I've tested the playbooks on:
+- Debian 9
+- Debian 10
+- Debian 11
+- Ubuntu (server) 18.04 LTS running as root
+- Ubuntu (Desktop) 19.04 running ad user
+- Centos 7
+
 I've started converting the roles to distinguish between OSes but it's incomplete.