NEIL Harris has challenged his players to stay in the top six for the rest of the season after their 2-1 win over Chesterfield lifted them into the play-off spots.
Millwall fell behind in the 25th minute to Sam Morsy's goal before Aiden O'Brien equalised and Lee Gregory scored his 14th of the season two minutes into the second half.
It was the first time Millwall have come from behind to win a game since the opening day of the season and it's also the first time they've been in the top six since relegation from the Championship.
"To get to where we are now is a great achievement by everybody," Harris said. "I just said to the guys there, 'Don't settle for that, don't settle for (thinking) we're in the top six, we've come a long way'.
"Let's stay there and let's make sure we only come out of the top six if we have a slight blip or because teams play when we don't. Let's keep going forward.
"I think we've shown in our performances against Oldham, Port Vale and Chesterfield, as much as we can be excellent against Southend and excellent in the first half against Port Vale, we've also got a growing mentality and determination that we can grind results out."
Chesterfield started much better than the away side and had gone close to taking the lead before Morsy's opener.
But O'Brien's 11th of the season changed the tone of the contest and Millwall started aggressively after the break, Gregory doing well to run onto Jed Wallace's pass to slot past Tommy Lee.
And Harris praised the more than 800 Millwall fans who made the trip north.
"I'm delighted for my players and the fans that came up here because certainly in the first 30 minutes we weren't at our best," Harris said. "I thought we deservedly went behind in the game, we never got going for some reason despite starting really well in games of late.
"We looked a little bit slow out of the traps and we certainly couldn't keep the ball. We worked very hard on our shape to win the ball back but gave it away very cheaply in the first half.
"I thought the difference from when we scored and the rest of the game was we took care of the football more."