diff --git a/composer.json b/composer.json
index 1d60aa4..b59894a 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
     "noem/tiny-proxy": "dev-main"
   },
   "require-dev": {
-    "phpunit/phpunit": "^9.5",
+    "phpunit/phpunit": "^9.5 || ^11.0",
     "mockery/mockery": "^1.4",
     "squizlabs/php_codesniffer": "^3.6",
     "noem/composer-file-embed": "dev-master"