diff --git a/composer.json b/composer.json
index 494b260..ccc6287 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
     },
     "require-dev": {
         "squizlabs/php_codesniffer": "^3.0",
-        "syntro/silverstripe-phpstan": "^1",
+        "syntro/silverstripe-phpstan": "^5",
         "phpunit/phpunit": "^9.4"
     },
     "keywords": [