diff --git a/composer.json b/composer.json
index dd89e44..2ef9227 100644
--- a/composer.json
+++ b/composer.json
@@ -6,11 +6,10 @@
   "license": "Apache-2.0",
   "require": {
     "php": ">=5.4.0",
-    "guzzlehttp/guzzle": "4.*",
-    "guzzlehttp/streams": "1.*"
+    "guzzlehttp/guzzle": "~4.1"
   },
   "require-dev": {
-    "phpunit/phpunit": "4.*"
+    "phpunit/phpunit": "~4.1"
   },
   "support": {
     "irc": "irc://irc.freenode.org/openstack-sdks",
@@ -25,4 +24,4 @@
       "OpenStack\\Tests\\": "tests/Tests"
     }
   }
-}
\ No newline at end of file
+}