diff --git a/composer.json b/composer.json
index aeaa392c..a2e1ebb5 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
         "pear/http_request2": "^2.3",
         "pear/versioncontrol_git": "@dev",
         "phing/phing": "^2.14",
-        "phpmd/phpmd": "^2.4",
+        "phpmd/phpmd": "2.13",
         "phpspec/prophecy-phpunit": "^2"
     },
     "autoload": {