Manchester United have previously expressed their interest in the powerhouse Kenyan midfielder but he insists he will be staying put with the Scottish champions at least for next season.
"I've not really spoken to my agent because I have been playing football and I'm not thinking about leaving or having talks. I'm not worried, I feel I am in the right club and I am happy.
"We want to do better next season. If we can win the treble that's my dream and we also want to be in the Champions League.
"It's been great, the manager has given me the chance to prove myself and for that I am grateful. I'm happy and want to do my best and try to pay the manager back for the faith he has shown in me because he has done a lot for the team."