diff --git a/conf/nginx.conf b/conf/nginx.conf
index 58bbde2..6cd2808 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -4,6 +4,8 @@ location __PATH__/ {
     alias __INSTALL_DIR__/;
     
     index index.html;
+
+    more_set_headers "Content-Security-Policy: frame-ancestors 'self'";
     
     # Include SSOWAT user panel.
     include conf.d/yunohost_panel.conf.inc;