diff --git a/composer.json b/composer.json
index 12a46ec..735579a 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
     }
   },
   "require-dev": {
-    "phpunit/phpunit": "^9.5"
+    "phpunit/phpunit": "^11.4"
   },
   "scripts": {
     "test": "vendor/bin/phpunit",