Update dependencies

composer.json

@@ -18,8 +18,8 @@
     ],
     "require": {
         "php": ">=5.3.2",
-        "symfony/framework-bundle": "2.*",
-        "symfony/security-bundle": "2.*",
+        "symfony/framework-bundle": "2.0.*",
+        "symfony/security-bundle": "2.0.*",
         "knplabs/knp-menu-bundle": "master-dev",
         "sonata-project/jquery-bundle": "master-dev",
         "sonata-project/exporter": "master-dev",