Queen's Park move up to fourth in the Championship thanks to a solitary Dom Thomas strike at home to Morton.
Having earlier struck the crossbar directly from a corner, Thomas broke the deadlock just before the interval with a deflected strike.
Zak Rudden and Josh Scott also struck the woodwork for the Glasgow side, who celebrated their first league win over Morton in 63 years.
The Greenock side remain in ninth place, still waiting for their first league win of the season.