At the start of the 2018–19 season, Emanuelson signed a contract extension with Utrecht, keeping him until 2020. He started out well, appearing in the first five league matches of the season and even scored his first goal for FC Utrecht, in a 1–1 draw against Fortuna Sittard on 1 September 2018. However, in a follow–up match against FC Emmen on 16 September 2018, Emanuelson was sent–off for a professional foul, just before half time, as the club lost 2–1. After serving a one math suspension, he returned to the starting line–up against FC Groningen on 30 September 2018, as FC Utrecht drew 1–1. Since returning from suspension, Emanuelson continued to remain involved in the first team for the club. He then scored his second goal for FC Utrecht, in a 2–1 win against AZ Alkmaar on 20 October 2018. On 9 December 2018 Emanuelson scored his third goal for the club, in a 3–1 win against Heracles Almelo. After the match, his performance was praised by Manager Dick Advocaat. He captained FC Utrecht for the first time against AZ Alkmaar on 19 January 2019, as the club lost 3–0. Two weeks later on 3 February 2019 against PEC Zwolle, Emanuelson set up FC Utrecht's second goal of the game before being sent–off in the 71st minutes for a professional foul, in a 4–3 loss. After being sidelined throughout February, he then scored his fourth goal of the season, in a 3–2 win against Feyenoord on 31 March 2019. Despite being further sidelined towards the end of the 2018–19 season, Emanuelson played once in the play-offs for the UEFA Europa League spot, as the club went on qualify for European football following a 3–1 win against Vitesse on aggragate. At the end of the 2018–19 season, he went on to make twenty–seven appearances and scoring four times in all competitions.