diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 5a59b3bd..82830939 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -20,8 +20,13 @@ class Configuration implements ConfigurationInterface {
     public function getConfigTreeBuilder() {
 
         //Create tree builder
-        $treeBuilder = new TreeBuilder();
-        $rootNode = $treeBuilder->root('combodo_doctrine_encrypt');
+        if (method_exists(TreeBuilder::class, 'getRootNode')) {
+            $treeBuilder = new TreeBuilder('combodo_doctrine_encrypt');
+            $rootNode = $treeBuilder->getRootNode();
+        } else {
+            $treeBuilder = new TreeBuilder();
+            $rootNode = $treeBuilder->root('combodo_doctrine_encrypt');
+        }
 
         // Grammar of config tree
         $rootNode
diff --git a/Twig/EncryptExtension.php b/Twig/EncryptExtension.php
index 396b0c82..2e5cc1fc 100644
--- a/Twig/EncryptExtension.php
+++ b/Twig/EncryptExtension.php
@@ -5,7 +5,7 @@
 use Combodo\DoctrineEncryptBundle\Services\EncryptorInterface;
 
 
-class EncryptExtension extends \Twig_Extension
+class EncryptExtension extends \Twig\Extension\AbstractExtension
 {
 
     private $encryptor;
@@ -19,7 +19,7 @@ public function __construct(EncryptorInterface $encryptor)
     public function getFilters()
     {
         return [
-            new \Twig_SimpleFilter('decrypt', [$this,'decrypt'], [
+            new \Twig\TwigFilter('decrypt', [$this,'decrypt'], [
                 //'is_safe' => ['html'],//to avoid autoescaping of HTML
             ]),
 
diff --git a/composer.json b/composer.json
index 69276970..8456150a 100644
--- a/composer.json
+++ b/composer.json
@@ -3,10 +3,10 @@
     "type": "library",
     "keywords": ["doctrine", "symfony", "aes256", "openssl", "encrypt", "decrypt", "bundle"],
     "license": "MIT",
-    "description": "Symfony 2 bundle which allows to encrypt data in database with some encrypt algorithm, this fork make use of open ssl",
+    "description": "Symfony 3+ bundle which allows to encrypt data in database with some encrypt algorithm, this fork make use of open ssl",
     "require": {
-        "php": ">=5.4",
-        "symfony/framework-bundle": ">=2.5",
+        "php": ">=5.5.9",
+        "symfony/framework-bundle": "^3.4|>=4.4",
         "doctrine/orm": ">=2.5",
         "ext-openssl": "*"
     },