diff --git a/Templating/TaskTwigExtension.php b/Templating/TaskTwigExtension.php
index fd799dd34..e79cdcda2 100644
--- a/Templating/TaskTwigExtension.php
+++ b/Templating/TaskTwigExtension.php
@@ -27,7 +27,7 @@ use Chill\TaskBundle\Workflow\TaskWorkflowManager;
  *
  * @author Julien Fastré <julien.fastre@champs-libres.coop>
  */
-class TaskTwigExtension extends \Twig_Extension
+class TaskTwigExtension extends AbstractExtension
 {
     /**
      *