Sefah whose contract was due to expire on 31st December 2019 has signed a new deal with the Kumasi giants.
He has expressed his delight in signing a new deal at the club
The right-back told Kotoko Express App after finalizing the deal at the club's secretariat on Monday: "I want to thank the coach and the management for the confidence they have shown in me.
"I have given my hundred per cent to this club and promises to increase it even more.
"Aside from the game, we have got players that need some leaders in the dressing room and my other colleagues and I will play that role very well."
Augustine Sefah joined Asante Kotoko from their rivals AshGold and has been committed to the cause of the Kumasi giants.