diff --git a/lib/devise_bootstrap_views_helper.rb b/lib/devise_bootstrap_views_helper.rb
index c80870b..aa4de9f 100644
--- a/lib/devise_bootstrap_views_helper.rb
+++ b/lib/devise_bootstrap_views_helper.rb
@@ -10,12 +10,10 @@ def bootstrap_devise_error_messages!
     )
 
     html = <<-HTML
-    <div class="alert alert-danger">
-      <button type="button" class="close" data-dismiss="alert" aria-label="Close">
-        <span aria-hidden="true">&times;</span>
-      </button>
+    <div class="alert alert-danger alert-dismissible fade show" role="alert">
       <h4 class="alert-heading">#{sentence}</h4>
       <ul class="mb-0">#{messages}</ul>
+      <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
     </div>
     HTML