diff --git a/composer.json b/composer.json
index f6d92c9..2ded092 100644
--- a/composer.json
+++ b/composer.json
@@ -8,7 +8,7 @@
     "require": {},
     "require-dev": {
         "phpmd/phpmd" : "@stable",
-        "phpunit/phpunit": "4.6.*",
+        "phpunit/phpunit": "4.8.*",
         "sebastian/phpcpd": "*",
         "squizlabs/php_codesniffer": "2.*"
     }