How to refresh parameters for a UserTask

Hi Community. 

I'm working with a user task and after I map all the fields in the process, adding a new paramenter in the user task it will not refresh the list in the parameters for the element in the bussines process. I'm wondering if there is some way to force the refresh/update parameters for the element? Normally for others elements (sub-process or webservice) is just click on it again.

Thanks,