diff --git a/composer.json b/composer.json
index ac93633..54daa45 100644
--- a/composer.json
+++ b/composer.json
@@ -18,6 +18,7 @@
         "symfony/framework-bundle": "2.1.*",
         "symfony/twig-bundle": "2.1.*",
         "symfony/form": "2.1.*",
+        "symfony/css-selector": "2.1.*",
         "symfony/validator": "2.1.*",
         "symfony/yaml": "2.1.*"
     },