WooCommerce is not updated with my theme?

I keep seeing this message:

Your theme (Pinnacle Child) contains outdated copies of some WooCommerce template files. These files may need updating to ensure they are compatible with the current version of WooCommerce. You can see which files are affected from the system status page. If in doubt, check with the author of the theme.

What should I do?
I’m not familiar with updating my template files..