diff --git a/roles/jupyterhub/templates/jupyterhub-nginx.conf b/roles/jupyterhub/templates/jupyterhub-nginx.conf
index 6758458e9..2911a5d5a 100644
--- a/roles/jupyterhub/templates/jupyterhub-nginx.conf
+++ b/roles/jupyterhub/templates/jupyterhub-nginx.conf
@@ -16,7 +16,7 @@ location   /jupyterhub {
         # WebSocket support
         proxy_http_version 1.1;
         proxy_set_header Upgrade $http_upgrade;
-        #proxy_set_header Connection $connection_upgrade;
+        proxy_set_header Connection $connection_upgrade;
         proxy_set_header X-Scheme $scheme;
         proxy_buffering off;
     }