The Quakers boss has earned a bumper new contract, keeping him at Blackwell Meadows until the summer of 2023.
He extended his commitment after an encouraging first year at the helm, taking the club to 11th before the season came to an early end.
Top scorer Adam Campbell, who bagged 16 goals last season, has also agree to stay on, with defender Jordan Watson putting pen to paper on Wednesday morning.
Louis Laing, Joe Wheatley, Michael Liddle and Will Hatfield have all signed on for next season.
The deals were aided by the club’s fans with the Boost the Budget campaign now passing £100,000.
Last month Armstrong told us last month that he was happy with his first years’ work.
“I would sum up the season as satisfying before the coronavirus hit,” he said.
“We haven’t scored enough goals, I think that’s the one area we are looking to address - the question is can we go out and get that 25-goal a season striker?
“Sometimes you have to ask yourself if a club can go up too soon.
“Would we be financially ready if we were to win promotion this season? I’m not sure we would, but in the years ahead we would give ourselves a better chance. I always knew this would be a two or three year plan.”