diff --git a/composer.json b/composer.json
index c71d5eb..7f5079d 100644
--- a/composer.json
+++ b/composer.json
@@ -31,6 +31,6 @@
   },
   "require-dev": {
     "doctrine/orm": ">2.4,<2.6",
-    "phpunit/phpunit": ">4.2"
+    "phpunit/phpunit": "~4.2"
   }
 }