Dijon became the first club to win promotion to Ligue 1 this season after Le Havre fell short at Evian.
Le Havre could have delayed Dijon in their bid to secure a top-three berth had they won in Annecy on Friday, but a 1-1 draw meant Olivier Dall'Oglio's side were able to celebrate returning to the top flight.
Dijon were relegated from Ligue 1 in 2011-12 after conceding 63 goals and enduring 20 losses.