diff --git a/build/composer.json b/build/composer.json
index 4447a72..255f4fd 100644
--- a/build/composer.json
+++ b/build/composer.json
@@ -4,6 +4,7 @@
     },
     "require": {
         "pdepend/pdepend": "^2.9",
-        "phpmetrics/phpmetrics": "^2.7"
+        "phpmetrics/phpmetrics": "^2.7",
+        "squizlabs/php_codesniffer": "^3.6"
     }
 }