diff --git a/composer.json b/composer.json
index 2a516fd..3c05348 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
         "ext-json": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.5.3",
+        "phpunit/phpunit": "^11.3.3",
         "mockery/mockery": "^1.4.0"
     },
     "autoload": {