How can I use java.lang.Double inside Camunda form field?

I wanted to specify the field inside my User Tasks’s Form field of type Double. Unfortunately, it is not supported (I saw a Jira ticket for someone asking it to be implemented). But what can I do meanwhile in order for this to work?

This is my attempt:


The error I get when I deploy is: “Unknown type”. I also tried typing double and Double, none of which had worked for me.