diff --git a/composer.json b/composer.json
index a21e9e1..70fc029 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
   ],
   "require": {
     "php": "^8.2",
-    "phpunit/phpunit": "^10.5.29",
+    "phpunit/phpunit": "^11.3.2",
     "react/async": "^4.3.0",
     "react/event-loop": "^1.5.0",
     "react/promise": "^3.2.0",