diff --git a/core/admin/mailu/ui/templates/fetch/create.html b/core/admin/mailu/ui/templates/fetch/create.html
index ed190961..1b5bc194 100644
--- a/core/admin/mailu/ui/templates/fetch/create.html
+++ b/core/admin/mailu/ui/templates/fetch/create.html
@@ -17,7 +17,7 @@
   {{ macros.form_field(form.tls) }}
   {% endcall %}
 
-  {% call macros.box(title="Authentication") %}
+  {% call macros.card(title="Authentication") %}
   {{ macros.form_field(form.username) }}
   {{ macros.form_field(form.password) }}
   {% endcall %}