Will pilates actually increase my height?

I've been doing pilates reformer classes only for a couple weeks and I love it! I notice when I get home that my posture is so much better. However, I've read about people gaining height from it. Is it true? I'm 5'7 and I'm completely okay with my height and wouldn't want to increase it at all, especially because I used to be insecure about it growing up, and only recently I've come to be comfortable with it. I don't have any particular posture problems, I guess the only thing is that my head is a little "forward".