diff --git a/nginx.conf b/nginx.conf
index a56528d79d0..1e46d0f4bca 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -5,7 +5,7 @@
   gzip_vary on;
   gzip_types text/plain text/css application/javascript;
   
-  add_header X-Frame-Options deny;
+  add_header X-Frame-Options DENY;
   server_tokens off; # Hide Nginx version
 
   server {