diff --git a/agaric/templates/block/block--system-menu-block--main.html.twig b/agaric/templates/block/block--system-menu-block--main.html.twig
index e7c3376..14370a5 100644
--- a/agaric/templates/block/block--system-menu-block--main.html.twig
+++ b/agaric/templates/block/block--system-menu-block--main.html.twig
@@ -1,3 +1,3 @@
 {% extends "@bulma/block/block--system-menu-block.html.twig" %}
 
-{% set attributes = attributes.addClass('navbar-menu') %}
+{% set attributes = attributes.addClass('navbar-end') %}