BBC Radio Kent:
"I made a promise to the chairman [Paul Scally] and told him that we would do well.
"I've run and gone for the money in the past but this time I will stay and see it through."
Gillingham are Allen's seventh different club since he started his managerial career with Barnet in 2003.
He added: "The chairman said to me, 'What are you going to do when all the speculation starts about moving to higher clubs in the Championship and top of League One, because all those clubs will want you?'"
"I squeezed his hand, went eye to eye with him and said: 'Mr Scally, I will stay here. Unless it's Premier League.'
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