diff --git a/portainer/rootfs/etc/nginx/includes/proxy_params.conf b/portainer/rootfs/etc/nginx/includes/proxy_params.conf
index 1990d4959..83f3be231 100644
--- a/portainer/rootfs/etc/nginx/includes/proxy_params.conf
+++ b/portainer/rootfs/etc/nginx/includes/proxy_params.conf
@@ -6,9 +6,7 @@ proxy_send_timeout          86400s;
 proxy_max_temp_file_size    0;
 
 proxy_set_header Accept-Encoding "";
-proxy_set_header Connection $connection_upgrade;
 proxy_set_header Host $http_host;
-proxy_set_header Upgrade $http_upgrade;
 proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 proxy_set_header X-Forwarded-Proto $scheme;
 proxy_set_header X-NginX-Proxy true;