In the 2012–13 season, Dirar started the season well for the club, setting-up a goal in a 4–0 win over Tours in the opening match of the domestic season. On 25 February 2013 he scored his first goal of the season, in a 1–0 win over Lens. After missing two matches, he scored on his return on 15 March in a 2–2 draw against Angers. On 22 April, he contributed a goal and an assist in a 4–0 win over Clermont. After a two-year absence from top-flight football, Dirar helped the club reach promotion to Ligue 1. On 24 May 2013, in the final match of the 2012–13 season during a match against Tours, he ruptured his cruciate ligaments. Following the match, it was announced he would be out for six months with cruciate ligaments injury. He finished the 2012–13 season with 3 goals from 37 appearances in all competitions.