diff --git a/composer.json b/composer.json
index de306bb..a2e1bd0 100644
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,8 @@
         "monolog/monolog": "^1.22"
     },
     "require-dev": {
-        "phpunit/phpunit": "^4.8"
+        "phpunit/phpunit": "^4.8",
+        "squizlabs/php_codesniffer": "2.*"
     },
     "include-path": ["src/"],
 	"autoload": {