diff --git a/php/form_fields.php b/php/form_fields.php
index d04909f..4a71cfd 100755
--- a/php/form_fields.php
+++ b/php/form_fields.php
@@ -1,6 +1,7 @@
-
 <?php
 
+defined( 'ABSPATH' ) || exit;
+
 class FormFields {
     public static function init_form_fields($callback_url = '') {
         $blockonomics = new Blockonomics;