diff --git a/composer.json b/composer.json
index 4fe8e19..adb6ad3 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
     "php": "~7.1 || ~8.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "^7.0 || ^8.0 || ^9.0",
+    "phpunit/phpunit": "^7.0 || ^8.0 || ^9.0 || ^11.0",
     "ext-xdebug": "*",
     "php": "~7.1 || ~8.0",
     "squizlabs/php_codesniffer": "^3.3",