diff --git a/composer.json b/composer.json
index f26cf7f..2198171 100644
--- a/composer.json
+++ b/composer.json
@@ -17,12 +17,12 @@
 	],
 
 	"require": {
-		"php": ">=5.3.2",
-		"phpunit/phpunit": "3.7.*",
-		"behat/behat": "2.5.*@stable",
-		"behat/mink": "1.6.*@stable",
-		"behat/mink-extension": "1.3.*-dev",
-		"behat/mink-selenium2-driver": "1.2.*@stable",
+		"php": ">=5.3.3",
+		"phpunit/phpunit": "~4.8",
+		"behat/behat": "~2.5.0",
+		"behat/mink": "~1.6.0",
+		"behat/mink-extension": "~1.3.0",
+		"behat/mink-selenium2-driver": "~1.2.0",
 		"symfony/dom-crawler": "~2.0",
 		"symfony/console": "~2.0",
 		"symfony/config": "~2.0",
@@ -55,5 +55,6 @@
 			"dev-master": "2.0.x-dev"
 		}
 	},
+	"prefer-stable": true,
 	"minimum-stability": "dev"
 }