Dijon have 15 points and trail second-bottom Lorient by eight points.
Kean put the visitors in front after six minutes, collecting Abdou Diallo‘s centre inside the box and firing home a cross-shot.
Mbappe doubled PSG’s advantage in the 32nd minute by converting a penalty after Bersant Celina‘s handball.
The France striker then netted his 18th league goal of the season — his 98th for PSG — six minutes into the second half when he curled a shot past goalkeeper Anthony Racioppi after being played through by Rafinha.
“Kylian is an outstanding player. We were all disappointed after his game against Monaco,” said PSG coach Mauricio Pochettino, referring to last weekend’s 2-0 home defeat against the principality side.
“He remained calm and he worked to be ready today. For the next games we will assess the conditions of Marco Verratti, Alessandro Florenzi, Mauro Icardi or Leandro Paredes, Sunday or Monday.”
Pereira rubbed salt in Dijon’s wounds eight minutes from time as he headed home from Julian Draxler’s corner.
“We knew we had 12 games to win and this one was the first,” added Pochettino.
Pereira rubbed salt in Dijon’s wounds eight minutes from time as he headed home from Julian Draxler‘s corner.