diff --git a/templates/etc/nginx/sites-available/etherpad.j2 b/templates/etc/nginx/sites-available/etherpad.j2
index 17aecfc..2517532 100644
--- a/templates/etc/nginx/sites-available/etherpad.j2
+++ b/templates/etc/nginx/sites-available/etherpad.j2
@@ -14,7 +14,7 @@
     proxy_set_header Host $host;
     proxy_http_version 1.1;
     proxy_set_header Upgrade $http_upgrade;
-    proxy_set_header Connection $connection_upgrade;
+    proxy_set_header Connection "upgrade";
  
 {% if item.secure_cookie is defined %}
     proxy_cookie_path / "/; secure; HttpOnly; SameSite=strict";
diff --git a/templates/etc/nginx/sites-available/mumble-web.j2 b/templates/etc/nginx/sites-available/mumble-web.j2
index f15054b..9543c58 100644
--- a/templates/etc/nginx/sites-available/mumble-web.j2
+++ b/templates/etc/nginx/sites-available/mumble-web.j2
@@ -18,7 +18,7 @@ map $http_upgrade $connection_upgrade {
     proxy_pass {{ item.proto }}://{{ item.server }}:{{ item.port }};
     proxy_http_version 1.1;
     proxy_set_header Upgrade $http_upgrade;
-    proxy_set_header Connection $connection_upgrade;
+    proxy_set_header Connection "upgrade";
   }
 
 {% endblock %}