diff --git a/unifi-network-application.subdomain.conf.sample b/unifi-network-application.subdomain.conf.sample
index cc0c67f..0d77afc 100644
--- a/unifi-network-application.subdomain.conf.sample
+++ b/unifi-network-application.subdomain.conf.sample
@@ -3,6 +3,7 @@
 # make sure that your dns has a cname set for unifi
 # NOTE: If you use the proxy_cookie_path setting in proxy.conf you need to remove HTTPOnly;
 # ex: proxy_cookie_path / "/; Secure";
+# change $upstream_port to 443 if connecting to a Unifi Cloud Key
 
 server {
     listen 443 ssl http2;