diff --git a/composer.json b/composer.json
index 06531e5..a5aa33d 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,7 @@
   },
   "require-dev": {
     "blumilksoftware/codestyle": "^5.1",
-    "phpunit/phpunit": "^11.5"
+    "phpunit/phpunit": "^11.5 || ^12.0"
   },
   "authors": [
     {