diff --git a/composer.json b/composer.json
index 69f0956..f85ad08 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
   ],
   "require": {
     "php": ">=5.4.0",
-    "guzzlehttp/guzzle": "5.3.0"
+    "guzzlehttp/guzzle": "^5.3.1"
   },
   "require-dev": {
     "phpunit/phpunit": "3.7.*"
@@ -29,6 +29,5 @@
       "Finix\\Tests\\": "tests/"
     }
   },
-  "minimum-stability": "dev",
-  "prefer-stable" : true
+  "minimum-stability": "dev"
 }