diff --git a/src/Resources/contao/templates/widget_filetree.html5 b/src/Resources/contao/templates/widget_filetree.html5
index 9bdf1c06..3137bd5e 100644
--- a/src/Resources/contao/templates/widget_filetree.html5
+++ b/src/Resources/contao/templates/widget_filetree.html5
@@ -1,8 +1,9 @@
 <?php
 
 use Contao\StringUtil;
+use Contao\System;
 
-$requestToken = \System::getContainer()->get('contao.csrf.token_manager')->getDefaultTokenValue();
+$requestToken = System::getContainer()->get('contao.csrf.token_manager')->getDefaultTokenValue();
 ?>
 <div>
     <input type="hidden" name="<?= $this->name ?>" id="ctrl_<?= $this->id ?>" value="<?= $this->value ?>">