diff --git a/composer.json b/composer.json
index c683a2cf..79d0c661 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
     },
     "require": {
         "php": ">=5.3.3",
-        "phpunit/phpunit": "~3.7|~4.0",
+        "phpunit/phpunit": "~4.0",
         "symfony/yaml": "~2.1",
         "ext-pdo": "*",
         "ext-simplexml": "*"