How to add category meta tag?

Hi there!

It seems like a very trivial thing, but I actually haven’t found how to do this with Yoast, or if this is even possible.

What I’m trying to do is have the meta tag for the category (standard WordPress categories) be put into the source code for each post, like so:

<meta name="category" content="xxxxxx">

How can this be done?

Thank you so much for your help!