diff --git a/composer.json b/composer.json
index dc055fe..238388a 100644
--- a/composer.json
+++ b/composer.json
@@ -39,7 +39,7 @@
         "php-http/mock-client": "^1.5",
         "php-soap/ext-soap-engine": "^1.7",
         "php-soap/engine-integration-tests": "^1.9",
-        "phpunit/phpunit": "^10.0",
+        "phpunit/phpunit": "^10.0 || ^11.0",
         "guzzlehttp/guzzle": "^7.5"
     },
     "config": {