Aegeus Mobile Issue in Google Webmasters

This is the message I received GWT after a recent theme update. (www.aaronbradley.com)

Search Console has identified that your site is affected by 2 Mobile Usability issues:

Top Issues

The following issues were found on your site:
– Text too small to read
– Viewport not set

We recommend that you fix these issues when possible to enable the best experience and coverage in Google Search.

Do you have any recommendations on fixing this or is the next theme update going to resolve it?

Thank you,

Michael