Wrap Text in circle resizing

Hi guys,

I'm wanting to wrap text in a circle. So I create a circle shape and use the text tool and click in the circle as my method to do it. My issue is that when I want to resize the circle, the text doesn't follow suit. The text stays exactly the same size. Is there a way I can do it so that when I adjust the circle the text also follows the shape? So its more dynamic?

Thanks,

Mark