diff --git a/composer.json b/composer.json
index c74d197..99cea21 100644
--- a/composer.json
+++ b/composer.json
@@ -28,8 +28,8 @@
     "require-dev": {
         "phlak/coding-standards": "^2.0",
         "phpstan/phpstan": "^1.11",
-        "phpunit/phpunit": "^10.0",
-        "yoast/phpunit-polyfills": "^1.0 || ^2.0"
+        "phpunit/phpunit": "^9.0 || ^10.0",
+        "yoast/phpunit-polyfills": "^2.0"
     },
     "autoload": {
         "psr-4": {