Newcastle keeper Forster wants Celtic deal
This season he has once again been Celtic's number one choice in goal, playing in 23 league games so far.
Forster said: "I think there has been a conversation with my agent and Peter Lawwell (Celtic chief executive) and he and the club need to sit down and have another one.
"It's negotiating and maybe it's a case of waiting until the summer but it will get done. There is plenty of time and I'm not particularly worried about that."