During the 2013 season, Halsti became an integral part of the Malmö side that secured the championship in late October 2013. Halsti continued to play as a central midfielder during the season and played 28 matches and scored two goals in his most successful season yet at the club. Halsti scored the only goal of the game in the last minutes of the first half in the home fixture against title contender AIK on 11 August 2013. He later scored the club's last goal of the season in the 3–1 win against Syrianska FC at home on 3 November 2013. For the 2014 season Halsti sporadically captained Malmö FF and was officially selected to the Allsvenskan Team of the Year. Halsti made 26 league appearances during his last season at the club as well as participating in all 12 matches of the club's 2014–15 UEFA Champions League campaign.