diff --git a/portainer.subdomain.conf.sample b/portainer.subdomain.conf.sample
index af9b93f..676d004 100644
--- a/portainer.subdomain.conf.sample
+++ b/portainer.subdomain.conf.sample
@@ -28,6 +28,7 @@ server {
         # enable for Authelia
         #include /config/nginx/authelia-location.conf;
 
+        include /config/nginx/proxy.conf;
         resolver 127.0.0.11 valid=30s;
         set $upstream_app portainer;
         set $upstream_port 9000;
@@ -35,7 +36,6 @@ server {
         proxy_pass $upstream_proto://$upstream_app:$upstream_port;
 
         proxy_set_header Connection "";
-        proxy_http_version 1.1;
         proxy_hide_header X-Frame-Options; # Possibly nott needed after Portainer 1.20.0
     }
 
@@ -51,6 +51,7 @@ server {
         # enable for Authelia
         #include /config/nginx/authelia-location.conf;
 
+        include /config/nginx/proxy.conf;
         resolver 127.0.0.11 valid=30s;
         set $upstream_app portainer;
         set $upstream_port 9000;
@@ -59,7 +60,6 @@ server {
 
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection "upgrade";
-        proxy_http_version 1.1;
         proxy_hide_header X-Frame-Options; # Possibly nott needed after Portainer 1.20.0
     }
 }