diff --git a/data/templates/nginx/plain/yunohost_admin.conf b/data/templates/nginx/plain/yunohost_admin.conf
index b6fabf8e3..2493e4033 100644
--- a/data/templates/nginx/plain/yunohost_admin.conf
+++ b/data/templates/nginx/plain/yunohost_admin.conf
@@ -60,7 +60,8 @@ server {
         if ($http_user_agent ~ (crawl|Googlebot|Slurp|spider|bingbot|tracker|click|parser|spider|facebookexternalhit) ) {
             return 403;
         }
-
+        # X-Robots-Tag to precise the rules applied.
+        add_header  X-Robots-Tag "nofollow, noindex, noarchive, nosnippet";
         # Redirect most of 404 to maindomain.tld/yunohost/sso
         access_by_lua_file /usr/share/ssowat/access.lua;
     }