diff --git a/composer.json b/composer.json
index 4e26cab..03e2368 100644
--- a/composer.json
+++ b/composer.json
@@ -47,7 +47,7 @@
     "laminas/laminas-hydrator" : "^4.1"
   },
   "require-dev" : {
-    "phpunit/phpunit" : "^9.5.4",
+    "phpunit/phpunit" : "^12.0.0",
     "phpmd/phpmd" : "^2.7.0",
     "squizlabs/php_codesniffer" : "^3.5.5",
     "laminas/laminas-captcha" : "^2.6"