diff --git a/lib/workos/authorization/add_role_permission.rb b/lib/workos/authorization/add_role_permission.rb
index da22eb7b..5f993410 100644
--- a/lib/workos/authorization/add_role_permission.rb
+++ b/lib/workos/authorization/add_role_permission.rb
@@ -8,7 +8,7 @@ class AddRolePermission < WorkOS::Types::BaseModel
       slug: :slug
     }.freeze
 
-    attr_accessor :slug
+    attr_accessor :slug, :foobar
 
     def initialize(json)
       hash = self.class.normalize(json)