diff --git a/Twig/Extension/FormExtension.php b/Twig/Extension/FormExtension.php
index ef330260..a68ec3c4 100644
--- a/Twig/Extension/FormExtension.php
+++ b/Twig/Extension/FormExtension.php
@@ -56,12 +56,4 @@ public function renderJavascript(FormView $view, $prototype = false)
 
         return $this->renderer->searchAndRenderBlock($view, $block);
     }
-
-    /**
-     * {@inheritdoc}
-     */
-    public function getName()
-    {
-        return 'genemu.twig.extension.form';
-    }
 }
diff --git a/composer.json b/composer.json
index 3fe6821c..5f10baec 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
         "php": "^5.5.9 | ^7.0",
         "symfony/framework-bundle": "^2.8 | ^3.0 | ^4.0",
         "symfony/form": "^2.8 | ^3.0 | ^4.0",
-        "twig/twig": "~1.14"
+        "twig/twig": "^1.26 | ~2.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.8.35 | ^5.7.11 | ^6.5"