diff --git a/composer.json b/composer.json
index a6eec49..38e4b55 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
         "silverstripe/framework": "^6"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.6",
+        "phpunit/phpunit": "^11.3",
         "squizlabs/php_codesniffer": "^3",
         "silverstripe/versioned": "^3",
         "silverstripe/standards": "^1",