diff --git a/composer.json b/composer.json
index 9f0cc1d..0ac90b0 100644
--- a/composer.json
+++ b/composer.json
@@ -35,7 +35,7 @@
         }
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.5",
+        "phpunit/phpunit": "^11.5",
         "broadway/coding-standard": "^1.2",
         "phpstan/phpstan": "^1.0"
     }