diff --git a/composer.json b/composer.json
index bb33b15..b4ab6d3 100644
--- a/composer.json
+++ b/composer.json
@@ -20,5 +20,10 @@
         "phpcompatibility/phpcompatibility-wp": "^2.1",
         "yoast/phpunit-polyfills": "^1.0.1",
         "phpunit/phpunit": "^5.7.21 || ^6.5 || ^7.5"
+    },
+    "config": {
+        "allow-plugins": {
+            "dealerdirect/phpcodesniffer-composer-installer": true
+        }
     }
 }