diff --git a/composer.json b/composer.json
index f22c607..fa6c5d8 100644
--- a/composer.json
+++ b/composer.json
@@ -20,14 +20,15 @@
         }
     ],
     "require": {
-        "php": ">=5.6",
         "silverstripe/framework": "^4",
+        "silverstripe/assets": "^1",
+        "silverstripe/versioned": "^1",
         "guzzlehttp/guzzle": "~6.3.0",
         "symfony/event-dispatcher": "^2.6.0@stable",
-        "symfony/http-foundation": "^2.6.0",
-        "silverstripe/assets": "^1"
+        "symfony/http-foundation": "^2.6.0"
     },
     "require-dev": {
+        "squizlabs/php_codesniffer": "^3",
         "phpunit/phpunit": "^5.7"
     },
     "suggest": {