Uploading files

Is there anyway to add the ability where .stl files are allowed to be uploaded with a form?

We process and work a lot with 3D images. The format .stl is what our customers use and would need to send to us. FYI: I signed up a few days ago. Today I upgraded to Silver. Love your platform, just really hoping we can work out a way to accept .stl files. Thank you. 

 Actually, I should have searched before asking. You already have the answer. Thank you. 

https://www.jotform.com/help/29-How-to-Change-the-Allowed-File-Types-in-the-Upload-Field