diff --git a/.travis.yml b/.travis.yml
index 45c77e3..3b732b0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,8 @@
 language: php
 
 php:
-  - 5.5
-  - 5.6
-  - 7.0
+  - 7.1
+  - 7.2
 
 before_script:
   - sudo apt-get -qq update
diff --git a/composer.json b/composer.json
index e1f7b41..61428d5 100644
--- a/composer.json
+++ b/composer.json
@@ -10,19 +10,19 @@
         }
     ],
     "require": {
-        "php":                 ">=5.5.9",
-        "twig/twig":           "~1.23|~2.0",
+        "php":                 "^7.1",
+        "twig/twig":           "^2.0",
         "twig/extensions":     "~1.0",
-        "symfony/twig-bridge": "~3.0|~4.0",
-        "symfony/routing":     "~3.0|~4.0",
-        "symfony/filesystem":  "~3.0|~4.0",
-        "symfony/translation": "~3.0|~4.0",
-        "symfony/form":        "~3.0|~4.0",
-        "symfony/asset":  "~2.8|~3.0|~4.0"
+        "symfony/twig-bridge": "^4.0",
+        "symfony/routing":     "^4.0",
+        "symfony/filesystem":  "^4.0",
+        "symfony/translation": "^4.0",
+        "symfony/form":        "^4.0",
+        "symfony/asset":       "^4.0"
     },
     "require-dev": {
-        "symfony/config":      "~3.0|~4.0",
-        "phpunit/phpunit":     "~4.8|~6.0"
+        "symfony/config":      "^4.0",
+        "phpunit/phpunit":     "^6.0"
     },
     "autoload": {
         "psr-0": { "Twig\\Gettext": "." }
diff --git a/twig-gettext-extractor b/twig-gettext-extractor
index 57e5c1b..d45aed5 100755
--- a/twig-gettext-extractor
+++ b/twig-gettext-extractor
@@ -33,11 +33,7 @@ $twig->addExtension(new Symfony\Bridge\Twig\Extension\TranslationExtension(
 $twig->addExtension(new Symfony\Bridge\Twig\Extension\RoutingExtension(
     new Twig\Gettext\Routing\Generator\UrlGenerator()
 ));
-$twig->addExtension(new Symfony\Bridge\Twig\Extension\FormExtension(
-    new Symfony\Bridge\Twig\Form\TwigRenderer(
-        new Symfony\Bridge\Twig\Form\TwigRendererEngine()
-    )
-));
+$twig->addExtension(new Symfony\Bridge\Twig\Extension\FormExtension());
 $twig->addExtension(new Symfony\Bridge\Twig\Extension\AssetExtension(
     new Symfony\Component\Asset\Packages()
 ));