How do I Increase the Dropdown Max occupancy, Max occupancy for adult(s) Fields

Hi,

I am updating an old site that is using Solidres 2.12.7 (Paid Version) and I need a Max occupancy, Max occupancy for adult(s) of 120 but the dropdown for these fields maxes out at 100. How can I increase it.

Thanks.

Screenshot: capture.dropbox.com/iVkv0uAn02vi7txs