The 21-year-old has developed into one of the best keepers in League One this season and has been tipped as a bright prospect by former England number one David James.
"Being a goalkeeper you need a lot of self-belief, a lot of confidence in your own ability," he said.
"I know I've got a long way to go but if I keep improving and keep playing week in week out then I don't see any reason why I can't get to the top one day.
"It's nice to hear things like that but you have to prove yourself. It's flattering to hear that from a top England international. But it's one thing saying it and another doing it.
"I know I have to continue to improve. I have a lot to learn but if I keep working hard there's no reason why I can't push on further."