diff --git a/composer.json b/composer.json
index 5b5c98a..8fa18e8 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
         "silverstripe/framework": "^6"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.6",
+        "phpunit/phpunit": "^11.3",
         "silverstripe/versioned": "^3",
         "squizlabs/php_codesniffer": "^3",
         "silverstripe/userforms": "^7",