diff --git a/composer.json b/composer.json
index 49865e4..cc40ab4 100644
--- a/composer.json
+++ b/composer.json
@@ -18,8 +18,8 @@
     ],
 
     "require": {
-        "php":                      ">=5.3.3",
-        "symfony/framework-bundle": "~2.0",
+        "php":                      ">=5.3.9",
+        "symfony/framework-bundle": "~2.1",
         "michelf/php-markdown":     "1.4.0"
     },