Morton beat Airdrieonians 3-0 at Cappielow on Friday evening to complete a 4-0 aggregate win in the Championship play-off final.
Robbie Muirhead opened the scoring with a stunning strike from distance after 12 minutes and Gary Oliver grabbed the second goal just before the break.
Muirhead rounded things off as Gus MacPherson's men secured their place in the Championship for next season while Ian Murray's side will again be playing in League 1.