diff --git a/src/Twig/OrderRefundsExtension.php b/src/Twig/OrderRefundsExtension.php
index 8d48cfa4..867686d8 100644
--- a/src/Twig/OrderRefundsExtension.php
+++ b/src/Twig/OrderRefundsExtension.php
@@ -20,9 +20,10 @@
 use Sylius\RefundPlugin\Model\RefundType;
 use Sylius\RefundPlugin\Provider\OrderRefundedTotalProviderInterface;
 use Sylius\RefundPlugin\Provider\UnitRefundedTotalProviderInterface;
+use Twig\Extension\AbstractExtension;
 use Twig\TwigFunction;
 
-final class OrderRefundsExtension extends \Twig_Extension
+final class OrderRefundsExtension extends AbstractExtension
 {
     /** @var OrderRefundedTotalProviderInterface */
     private $orderRefundedTotalProvider;