Allow guest user to attach file on force.com site?

I’m diving into my first force.com site using skuid, which has worked really well! I’m attempting to create a skuid page where a guest user can enter information and attach a file, once they click submit it creates a contact record in salesforce.

When I test the page as the guest user, the file component does not appear. Is it possible for a guest user to attach files?

Any help is much appreciated!