The Lions were promoted from League One after their Wembley victory over Swindon last term and Jackett is looking to repeat the trick. His side are currently six points outside the top six ahead of a hectic spell which sees them play seven matches in April.
"We're six points off the play-offs, so it is still open," said Jackett.
"Everyone from us upwards is still in the hunt but obviously we will need a lot of points.
"We've got seven games in April so after next Saturday we need to regroup."