diff --git a/setup/openvpn.conf b/setup/openvpn.conf
index 3934a2e..6b657f5 100644
--- a/setup/openvpn.conf
+++ b/setup/openvpn.conf
@@ -14,7 +14,8 @@ keepalive 10 60
 persist-key
 persist-tun
 topology subnet
-#duplicate-cn
+# comment next line if you don't want allow users to use single account on multiple devices
+duplicate-cn
 #proto tcp
 #port 1194
 #dev tun0