diff --git a/files/gitlab-cookbooks/gitlab/templates/default/nginx-gitlab-http.conf.erb b/files/gitlab-cookbooks/gitlab/templates/default/nginx-gitlab-http.conf.erb
index 3f8cc83..d1b9589 100644
--- a/files/gitlab-cookbooks/gitlab/templates/default/nginx-gitlab-http.conf.erb
+++ b/files/gitlab-cookbooks/gitlab/templates/default/nginx-gitlab-http.conf.erb
@@ -77,6 +77,7 @@ server {
     proxy_set_header   Host              $http_host;
     proxy_set_header   X-Real-IP         $remote_addr;
     proxy_set_header   X-Forwarded-For   $proxy_add_x_forwarded_for;
+    proxy_set_header   X-Frame-Options   SAMEORIGIN;
 
     proxy_pass http://gitlab;
   }
--
libgit2 0.21.2