diff --git a/data/templates/nginx/server.tpl.conf b/data/templates/nginx/server.tpl.conf
index fa8b6586b..14cb52abc 100644
--- a/data/templates/nginx/server.tpl.conf
+++ b/data/templates/nginx/server.tpl.conf
@@ -1,3 +1,8 @@
+map $http_upgrade $connection_upgrade {
+        default upgrade;
+        ''      close;
+}
+
 server {
     listen 80;
     listen [::]:80;