diff --git a/composer.json b/composer.json
index 3a5d090..71f0683 100755
--- a/composer.json
+++ b/composer.json
@@ -19,9 +19,10 @@
         "phpunit/phpunit": "~4.8",
         "satooshi/php-coveralls": "~1.0",
         "symfony/yaml": "~2",
-        "symfony/config": "~2.1",
+        "symfony/config": "~2",
         "symfony/console": "~2",
         "symfony/stopwatch": "~2",
+        "symfony/filesystem": "~2",
         "doctrine/instantiator": "1.0.4"
     },
     "autoload": {