diff --git a/conf/nginx.conf b/conf/nginx.conf
index b5f38e3..d3ddd3c 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -5,6 +5,8 @@ location __PATH__/ {
     
     index index.html;
     
+    add_header Content-Security-Policy "frame-ancestors 'self'";
+    
     # Include SSOWAT user panel.
     include conf.d/yunohost_panel.conf.inc;
 }