diff --git a/portainer.subfolder.conf.sample b/portainer.subfolder.conf.sample
index 9ec6de6..af8ebf0 100644
--- a/portainer.subfolder.conf.sample
+++ b/portainer.subfolder.conf.sample
@@ -20,6 +20,7 @@ location ^~ /portainer/ {
     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;
@@ -32,6 +33,7 @@ location ^~ /portainer/api/websocket/ {
     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;