diff --git a/composer.json b/composer.json
index fd7a0b3..74593cb 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
   "prefer-stable": true,
   "require": {
     "php": "^7.1 || ^8.0",
-    "phpunit/phpunit": "~8.0 || ~9.0 || ~10.0 || ~11.0",
+    "phpunit/phpunit": "~8.0 || ~9.0 || ~10.0 || ~11.0 || ~12.0",
     "psr/http-message": "^1.0 || ^2.0",
     "symfony/process": "^4.4 || ^5.1 || ^6.0 || ^7.0"
   },