diff --git a/app/Factories/ConfigurationResolverFactory.php b/app/Factories/ConfigurationResolverFactory.php
index 33b25823..71fc9d8c 100644
--- a/app/Factories/ConfigurationResolverFactory.php
+++ b/app/Factories/ConfigurationResolverFactory.php
@@ -21,6 +21,7 @@ class ConfigurationResolverFactory
         'per',
         'psr12',
         'symfony',
+        'empty',
     ];
 
     /**