Scott McDonald believes 'humble pie' should be the dish of the day for Celtic's detractors.
The striker helped the club pick up a 1-0 win away at Dundee United on Thursday to secure a third consecutive SPL title.
Having fallen six points behind arch-rivals Rangers at the beginning of April, many people had written off Celtic's chances of retaining their crown.
However, a run of seven wins in a row saw Gordon Strachan's men stage a dramatic late comeback to ensure that the trophy remains at Parkhead.
McDonald insists that certain sections of the club's support now owe the manager an apology after they threatened to undermine the Hoops' title charge with needless barracking of the boss during a difficult spell.
"The supporters here are very passionate people and they were disappointed at that point in time and obviously showed their feelings," said McDonald.
"Maybe a few people are eating some humble pie right now.
"The players all came out and supported the gaffer and we know how lucky we are to have him here and long may that continue.
"If I had have said to you seven weeks ago that we would be sitting here (as champions) you would probably have laughed.
"The gaffer wasn't affected by it all. It's not the first time he has come under heavy criticism as a manager or when he was a player.
"When you come to a club like this, you have to deal with it. Those are just the pressures of playing in Glasgow.
"But he never stopped believing in his players. Over that period there weren't many changes made to the team.
"He had full belief and confidence in the players and not for one minute did that change and that is one of the reasons we won the title.
"There is no question in my mind that the manager will be here next season and I look forward to doing it all over again."
Strachan has become the first Celtic boss to win the title three times in a row since Jock Stein was in charge, and McDonald believes the current coach has earned his place alongside his legendary predecessor.
"This is my first title and it's very special for me but the others said it was the most memorable for them and one that they will be talking about 20 years down the line," said the Australian international.
"Obviously we needed results to go our way but we stuck at it, piled the pressure on and we stand as champions which is fantastic."