Although Hugo modules are supposed to make life simple, this took me an embarrassingly long time to fathom. In this tutorial, I’ll show you how to add a theme as a module of your Hugo site. I’m assuming you already have a Hugo site and have chosen a theme that’s available as a module. If you want to learn more about modules, take a look at the Hugo documentation. Step 1 - Ensure you have installed Go To use Hugo modules, you’ll need Go.