3D FlipBook - Bootstrap vulnerability

A vulnerability assessment of our website found that 3D Flipbook is using an old version of Bootstrap (version 3.2) which has vulnerable aspect that can be exploited. It appears the current version of Bootstrap is v5.1. (https://getbootstrap.com/docs/versions/)

Could you please update the version of Bootstrap being used by 3D Flipbook? Could you please provide a likely timeframe for this?

Thanks

Jon