diff --git a/composer.json b/composer.json
index d780786..69649cb 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
     "ext-dom": "*"
   },
   "require-dev": {
-    "phpunit/phpunit": "~6.0 || ~7.0 || ~9.0"
+    "phpunit/phpunit": "~12.0"
   },
   "autoload": {
     "psr-4": {