diff --git a/composer.json b/composer.json
index 9e1c8f0b..2c22111b 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
 		}
 	},
 	"require-dev": {
-		"phpunit/PHPUnit": "~3.7"
+		"phpunit/phpunit": "^3 || ^4 || ^5"
 	},
 	"autoload": {
 		"classmap": ["code"]