Brian McDermott`s side have slipped to 11th in the table but are only seven points off the play-offs with a game in hand.
Mills said: "We have a tight-knit bunch. A few were away on international duty but everyone is back now and focussed.
"There are plenty of games left and lots of points to play for and if we win every game left this season then we will be promoted.
"That`s what we have to aim for starting with Norwich at the weekend."
Source: PA
Source: PA