diff --git a/composer.json b/composer.json
index 2e78479a..462381da 100644
--- a/composer.json
+++ b/composer.json
@@ -33,7 +33,7 @@
         "ray/compiler": "^1.9.1"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.5.10",
+        "phpunit/phpunit": "^11.4.1",
         "bamarni/composer-bin-plugin": "^1.8"
     },
     "autoload": {