diff --git a/composer.json b/composer.json
index aed1bcd..098102a 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
         "ircmaxell/random-lib": "^1.1"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8.5.29 || ^9"
+        "phpunit/phpunit": "^11.4.3"
     },
     "license": "MIT",
     "autoload":{