diff --git a/composer.json b/composer.json
index 2a0004d..2bb9c82 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,7 @@
         "php": "^7.4 || ^8.0 || ^8.1"
     },
     "require-dev": {
-        "phpunit/phpunit": "~9",
+        "phpunit/phpunit": "~11",
         "squizlabs/php_codesniffer": "~3"
     },
     "authors": [