diff --git a/composer.json b/composer.json
index 690778a..9391b40 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
         "psr/log": "^3"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.6",
+        "phpunit/phpunit": "^11.3",
         "squizlabs/php_codesniffer": "^3",
         "silverstripe/versioned": "^3",
         "silverstripe/standards": "^1",