diff --git a/composer.json b/composer.json
index f34b6be..e8c64c4 100644
--- a/composer.json
+++ b/composer.json
@@ -23,6 +23,7 @@
         }
     }
   , "require": {
-        "php": ">=5.4.2"
+        "php": ">=5.3.9"
+      , "guzzle/http": "~3.6"
     }
 }