The Frenchman put pen to paper on a new deal - which will keep him at the Parc des Princes until June 2016 - less than 24 hours after PSG were crowned Ligue 1 champions courtesy of Monaco's draw at home to Guingamp on Wednesday evening.
Ibrahimovic feels that the former France international, who has also masterminded a Coupe de la Ligue triumph in his debut season at the helm, fully merited his one-year extension.
"He's done very good work this year. He deserves to stay," the Sweden international is quoted as saying by Ligue 1's official site.
"He has proven his worth. The club have every confidence in him and that's why he has extended his contract.
"I'm sure that he'll do even better work next year."