diff --git a/composer.json b/composer.json
index 15883cb..7697df8 100644
--- a/composer.json
+++ b/composer.json
@@ -12,10 +12,14 @@
         {
             "name":  "Pablo Díez",
             "email": "pablodip@gmail.com"
+        },
+        {
+            "name":  "Ádám Bálint",
+            "email": "adam.balint@srg.hu"
         }
     ],
     "require": {
-        "php":       "^5.6.0",
+        "php":       "^5.6",
         "twig/twig": "^1.2"
     },
     "autoload": {
diff --git a/src/Mandango/Mondator/ClassExtension.php b/src/Mandango/Mondator/ClassExtension.php
index dc9647a..815e235 100644
--- a/src/Mandango/Mondator/ClassExtension.php
+++ b/src/Mandango/Mondator/ClassExtension.php
@@ -409,7 +409,7 @@ public function getTwig()
                 throw new \RuntimeException('Twig is required to use templates.');
             }
 
-            $loader = new StringLoader();
+	          $loader = new \Twig_Loader_String();
             $twig = new \Twig_Environment($loader, array(
                 'autoescape'       => false,
                 'strict_variables' => true,
diff --git a/src/Mandango/Mondator/StringLoader.php b/src/Mandango/Mondator/StringLoader.php
deleted file mode 100644
index 57c00ee..0000000
--- a/src/Mandango/Mondator/StringLoader.php
+++ /dev/null
@@ -1,61 +0,0 @@
-<?php
-
-namespace Mandango\Mondator;
-
-	/*
-	 * This file is part of Twig.
-	 *
-	 * (c) 2009 Fabien Potencier
-	 *
-	 * For the full copyright and license information, please view the LICENSE
-	 * file that was distributed with this source code.
-	 */
-
-/**
- * Loads a template from a string.
- *
- * This loader should NEVER be used. It only exists for Twig internal purposes.
- *
- * When using this loader with a cache mechanism, you should know that a new cache
- * key is generated each time a template content "changes" (the cache key being the
- * source code of the template). If you don't want to see your cache grows out of
- * control, you need to take care of clearing the old cache file by yourself.
- *
- * @deprecated since 1.18.1 (to be removed in 2.0)
- *
- * @author Fabien Potencier <fabien@symfony.com>
- */
-class StringLoader implements \Twig_LoaderInterface
-{
-	/**
-	 * {@inheritdoc}
-	 */
-	public function getSource($name)
-	{
-		return $name;
-	}
-
-	/**
-	 * {@inheritdoc}
-	 */
-	public function exists($name)
-	{
-		return true;
-	}
-
-	/**
-	 * {@inheritdoc}
-	 */
-	public function getCacheKey($name)
-	{
-		return $name;
-	}
-
-	/**
-	 * {@inheritdoc}
-	 */
-	public function isFresh($name, $time)
-	{
-		return true;
-	}
-}