Incompatible Plugin with Gallery2

Question

Using Gallery2 a standard gallery system I use I just installed on one of my websites. I then used a pretty simple Clean theme for including a header.php and footer.php files to match the same layout as the main website.

However, when I installed the theme/plugin I was prompted with this:

Clean theme based on Siriux.net Gallery theme
Incompatible plugin!
Core API Required: 7.20 (available: 7.18)
Plugin API Required: 2.4 (available: 3.5)

Is there a config file that I can trick so it believes they are compatible?

Thanks.

Answer 1

Ended up just editing the Siriux theme.