diff --git a/README.md b/README.md
index 4a1e4ca..6642931 100644
--- a/README.md
+++ b/README.md
@@ -149,6 +149,8 @@ By default the script configures plain ZFSBootMenu without networking nor an SSH
 
 #### IP address
 
+> IPv6 addresses are untested. Script has been confirmed working with IPv4 addresses.
+
 ```
 ARCHZBM_NET_CLIENT_IP=''
 ARCHZBM_NET_SERVER_IP=''