diff --git a/composer.json b/composer.json
index 2133239..70b4641 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
     "require-dev": {
         "phlak/coding-standards": "^2.0",
         "vimeo/psalm": "^4.7",
-        "yoast/phpunit-polyfills": "^1.0"
+        "yoast/phpunit-polyfills": "^2.0"
     },
     "autoload": {
         "psr-4": {