diff --git a/composer.json b/composer.json
index 3146dfb..fbb4536 100644
--- a/composer.json
+++ b/composer.json
@@ -38,7 +38,7 @@
     "require-dev": {
         "php-http/psr7-integration-tests": "^1.4",
         "phpstan/phpstan": "^1.12",
-        "phpunit/phpunit": "^9.6",
+        "phpunit/phpunit": "^11.0",
         "sunrise/coding-standard": "^1.0",
         "vimeo/psalm": "^5.26"
     },