How can I remove specific date range from dropdown date field?

I created a new registration form using WP FORMS. Need to remove the date range from 2017 to 2000 from the form field "My Birthday" on this page - https://manilaconnection.com
https://static.livechatinc.com/8801096/OUW48HL6BL/884347cdd4b3cfd53a39de68e19262ee/Birthday.png