diff --git a/composer.json b/composer.json
index b1618d2..40a7dba 100644
--- a/composer.json
+++ b/composer.json
@@ -22,6 +22,6 @@
   , "require": {
         "php": ">=5.3.2"
       , "guzzle/guzzle": "v2.0.2"
-      , "symfony/http-foundation": "dev-master"
+      , "symfony/http-foundation": "2.1.*"
     }
 }
\ No newline at end of file