diff --git a/portainer.subdomain.conf.sample b/portainer.subdomain.conf.sample
index ad6642e..3c09a86 100644
--- a/portainer.subdomain.conf.sample
+++ b/portainer.subdomain.conf.sample
@@ -32,6 +32,7 @@ server {
         include /config/nginx/proxy.conf;
         include /config/nginx/resolver.conf;
         set $upstream_app portainer;
+        set $upstream_port 8000;
         set $upstream_port 9000;
         set $upstream_proto http;
         proxy_pass $upstream_proto://$upstream_app:$upstream_port;
@@ -54,6 +55,7 @@ server {
         include /config/nginx/proxy.conf;
         include /config/nginx/resolver.conf;
         set $upstream_app portainer;
+        set $upstream_port 8000;
         set $upstream_port 9000;
         set $upstream_proto http;
         proxy_pass $upstream_proto://$upstream_app:$upstream_port;