diff --git a/composer.json b/composer.json
index 312339c..10537fd 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
   },
   "require-dev": {
     "laminas/laminas-coding-standard": "^3.1",
-    "phpunit/phpunit": "^11.5",
+    "phpunit/phpunit": "^12.0",
     "psalm/plugin-phpunit": "^0.19.5",
     "vimeo/psalm": "^6.10"
   },