Morton extended their lead at the top of the First Division to five points with a home victory against Livingston.
Martin Hardie converted Peter MacDonald's pass to put the hosts ahead on the quarter-hour mark.
Iain Russell levelled for Livi with a 25-yard strike eight minutes into the second half.
But MacDonald headed home Michael Tidser's left-wing cross midway through the second half to claim all three points for Morton.
Morton: Gaston, Taggart, Rutkiewicz, Mark McLaughlin, Reid, Bachirou, Hardie, Tidser, Graham (Wilkie 69), MacDonald (Weatherson 83), O'Brien. Subs Not Used: Hutton, Wallace, Halsman.
Booked: Bachirou, Graham, Taggart.
Goals: Hardie 15, MacDonald 68.
Livingston: McNeil, Kyle Jacobs, Garcia Tena, Barr, McCann (Booth 87), Andreu, O'Brien, Fox (Mullen 75), Iain Russell (Morton 69),McNulty, Scougall. Subs Not Used: Jamieson, Fordyce.
Booked: Fox, McCann.
Goals: Iain Russell 53.
Ref: Stephen Finnie