Can a hunch back be cured?

Ok i'm not talking about a MAJOR hunch, i slouch a little bit sometimes, it used to be a lot worse when i was younger, im 17 now and it's getting a lot better. It really makes me insecure, its not super noticeable, but sometimes when im on the computer, or when im sitting down it is. I recently got a fitness trainer too, and im hoping that will help. From experience has anyone had or known some one who had a hunch back and has it been "cured?"