diff --git a/components/sidebar/categories.php b/components/sidebar/categories.php
index 9d15833..90bc9f5 100644
--- a/components/sidebar/categories.php
+++ b/components/sidebar/categories.php
@@ -7,7 +7,7 @@
 
   foreach( $parent_categories as $parent_category ) {
 ?>
-    <section class="card head-primary d-none d-block-sm">
+    <section class="card head-primary d-none d-flex-sm">
       <h2 class="card-header"><i class="fa fa-folder" aria-hidden="true"></i> <?php echo $parent_category->name ?></h2>
       <div class="menu fg-dark">
         <ul>