At the start of the 2019 season, Lindgren continued to regain his first team place in the centre–back position, as well as, his captaincy. He then set up the club’s only goal of the game, in a 1–0 win against GIF Sundsvall on 5 May 2019. After the match, Lindgren was named Team of the Week for his performance. However, he missed the next three matches, due to illness. Lindgren made his return to the first team against IFK Göteborg on 24 May 2019, as BK Häcken lost 2–1. Six days later on 30 May 2019, Lindgren won his first silverware with the club when he played the full 90 minutes as BK Häcken won the 2018–19 Svenska Cupen, beating AFC Eskilstuna 3–1 in the final. It was announced on 13 September 2019 that Lindgren signed a contract with the club, keeping him until 2021. He previously stated his desire to stay at the club and beyond. At the end of the 2019 season, Lindgren made thirty–five appearances in all competitions.