diff --git a/composer.json b/composer.json
index a061f21..8a03e36 100644
--- a/composer.json
+++ b/composer.json
@@ -8,7 +8,7 @@
 	},
 	"require-dev": {
 		"phpunit/phpunit": "^9.6",
-		"yoast/phpunit-polyfills": "^2.0",
+		"yoast/phpunit-polyfills": "^4.0",
 		"wp-phpunit/wp-phpunit": "^7.0",
 		"wp-coding-standards/wpcs": "^3.0",
 		"dealerdirect/phpcodesniffer-composer-installer": "^1.0",