diff --git a/src/form.lisp b/src/form.lisp
index 794ea0c..52b4491 100644
--- a/src/form.lisp
+++ b/src/form.lisp
@@ -512,7 +512,7 @@ ACTION: Form action.
 INTRO: Write some information related to the form. Could be a introduction."
   `(spinneret:with-html
      (:div
-      (when ,intro (:p ,intro))
+      (when ,intro (:p :class "alert alert-light" ,intro))
       (:form :action (unless ,action "/")
              :method "post"
              :class (spacing :property "m" :side "y" :size 1)