diff --git a/lib/config/validation.ts b/lib/config/validation.ts
index 3739936f5c54ad00d2561a73ba7f25dcbc167753..91984b7cfe38ce22c799d8aaf390440d512466a2 100644
--- a/lib/config/validation.ts
+++ b/lib/config/validation.ts
@@ -48,6 +48,7 @@ export async function validateConfig(
       'forkToken',
       'repository',
       'vulnerabilityAlertsOnly',
+      'vulnerabilityAlert',
       'copyLocalLibs', // deprecated - functionality is now enabled by default
       'prBody', // deprecated
     ];