diff --git a/conf/nginx.conf b/conf/nginx.conf
index d9826db..20260cf 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -6,7 +6,7 @@ location ^~ __PATH__/ {
   proxy_set_header  X-Forwarded-Proto $scheme;
   proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
   proxy_set_header  X-Forwarded-Host $server_name;
-  add_header X-Frame-Options "ALLOW-FROM https://__NEXTCLOUDDOMAIN__/";
+  add_header X-Frame-Options "ALLOW-FROM https://__NEXTCLOUDDOMAIN__" always;
 
   proxy_http_version 1.1;
   proxy_set_header Upgrade $http_upgrade;