diff --git a/composer.json b/composer.json
index 7b4f5fc7..a91c3028 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,8 @@
         "wp-coding-standards/wpcs": "^3.1",
         "phpcompatibility/phpcompatibility-wp": "^2.1",
         "yoast/phpunit-polyfills": "^1.0.1",
-        "phpunit/phpunit": "^5.7.21 || ^6.5 || ^7.5"
+        "phpunit/phpunit": "^5.7.21 || ^6.5 || ^7.5 || ^8.5 || ^9",
+        "doctrine/instantiator": "^1.0"
     },
     "scripts": {
         "e2e": "npx -y playwright test --timeout 300000"