diff --git a/composer.json b/composer.json
index f5b3b08f7..533c19299 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,8 @@
     },
     "require-dev": {
         "symfony/yaml": "~2.3|~3.0",
-        "phpunit/phpunit": "^5.4"
+        "phpunit/phpunit": "^5.4",
+        "malukenho/docheader": "^0.1.4"
     },
     "suggest": {
         "symfony/yaml": "If you want to use YAML Metadata Mapping Driver"