Manual Upgrade from 3.1.3 --> 3.2.0 on Self Hosted

I assume I simply unzip and overwrite for the site files but what about the database…?

Or is there an even simpler method…?

The app should detect the new version and run the database migration.

http://docs.invoiceninja.com/en/latest/update.html

It did when I overwrote the files, thanks.