diff --git a/composer.json b/composer.json
index 573bb37..548d8da 100644
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,8 @@
     "malukenho/docheader": "^1",
     "yoast/phpunit-polyfills": "^3",
     "phpunit/phpunit": "^7.5 || ^8.5 || ^9.5 || ^10",
-    "squizlabs/php_codesniffer": "^3"
+    "squizlabs/php_codesniffer": "^3",
+    "php-parallel-lint/php-parallel-lint": "^1.4"
   },
   "license": "MIT",
   "authors": [