Problem Centering Text in a Box

I'm running into a problem for graphics of a show I'm working on where I can't get text to align properly inside of a box. I've created a guide to the center of the box, I center the anchor point of my text box and place it to the center of the guide. The issue is that the text box changes size depending on if there are descenders in the characters.

Here is what I mean: https://imgur.com/a/U0VQP9F

Is there a way I can design my compositions so that when I replace the text it automatically is centered to the exact same point, regardless if there are descenders or not?