diff --git a/lib/FormBuilder.lib.php b/lib/FormBuilder.lib.php
index 35e8fe3..fa12936 100644
--- a/lib/FormBuilder.lib.php
+++ b/lib/FormBuilder.lib.php
@@ -242,7 +242,7 @@ ITEMBOTTOM;
 HTMLBOTTOM;
 
         if (!empty($this->buttons)) {
-            $html .= "\n        <div class=\"card-footer\">";
+            $html .= "\n        <div class=\"card-footer d-flex\">";
             foreach ($this->buttons as $btn) {
                 $btnhtml = "";
                 $inner = "<i class=\"$btn[icon]\"></i> $btn[text]";