diff --git a/composer.json b/composer.json
index e9376c3..414a84f 100644
--- a/composer.json
+++ b/composer.json
@@ -8,8 +8,8 @@
     }
   ],
   "require-dev": {
-    "phpunit/phpunit": "^9.6.34",
-    "yoast/phpunit-polyfills": "^2.0.5",
+    "phpunit/phpunit": "^13.0.2",
+    "yoast/phpunit-polyfills": "^4.0.0",
     "tangible/framework": "dev-main"
   },
   "require": {},