diff --git a/composer.json b/composer.json
index e29e7dd..d33aea7 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
     "guzzlehttp/guzzle": "^6.1|^7.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "^5.7 || ^7.3",
+    "phpunit/phpunit": "^5.7 || ^7.3 || ^10.0",
     "friendsofphp/php-cs-fixer": "^2.0",
     "php-coveralls/php-coveralls": "^2.1"
   },