The 31-year-old has scored 10 goals in his first nine games for the French club, and he has insisted that despite his age, he can still become a better player.
Ibrahimovic told reporters: "Each day that you play and every match that you play, you get stronger in experience. I feel I am getting better with each year that passes and I'm playing in a manner that I want to play.
"The day I stop progressing is the day that I stop playing football."
Ibrahimovic joined Paris Saint-Germain from AC Milan during the summer.