diff --git a/composer.json b/composer.json
index 44ccb1e..ff6f240 100644
--- a/composer.json
+++ b/composer.json
@@ -30,7 +30,7 @@
         "ext-json": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "^10.1 || ^11.0"
+        "phpunit/phpunit": "^10.1 || ^11.0 || ^12.0"
     },
     "autoload": {
         "psr-4": {