Dumbarton 0-1 Dundee
Dundee goalkeeper Kyle Letheren's late penalty save proved crucial as the Scottish Championship leaders secured a narrow win over Dumbarton.
Peter MacDonald had just capitalised on a mistake by keeper Stephen Grindlay to fire the visitors ahead when the Sons won a spot-kick.
Christopher Kane was brought down by Kyle Benedictus but Letheren blocked Bryan Prunty's effort from 12 yards.
And the result preserved Dundee's one-point advantage over Hamilton.