diff --git a/composer.json b/composer.json
index a574e35..eeab2a8 100644
--- a/composer.json
+++ b/composer.json
@@ -48,7 +48,10 @@
   "minimum-stability": "dev",
   "prefer-stable": true,
   "config": {
-    "sort-packages": true
+    "sort-packages": true,
+    "allow-plugins": {
+      "dealerdirect/phpcodesniffer-composer-installer": true
+    }
   },
   "extra": {
     "branch-alias": {