diff --git a/composer.json b/composer.json
index 1af5f4c1c..a565b3fe6 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
         "cakephp/cakephp-codesniffer": "^5.0",
         "cakephp/debug_kit": "^5.0.0",
         "josegonzalez/dotenv": "^4.0",
-        "phpunit/phpunit": "^10.5.5 || ^11.1.3"
+        "phpunit/phpunit": "^10.5.5 || ^11.1.3 || ^12.1"
     },
     "suggest": {
         "cakephp/repl": "Console tools for a REPL interface for CakePHP applications.",