Andrew Graham scored the winning goal as Dumbarton recorded a 2-1 victory over Hamilton.
The visitors almost went ahead in the sixth minute when Alister Crawford's long-range effort clattered the crossbar before being cleared away to safety.
The Sons broke the deadlock in the 11th minute when Garry Fleming found the bottom corner from the middle of the box.
Ian Murray's side could have doubled their lead seven minutes later but Scott Linton's effort came back off the bar.
Accies drew level in the 33rd minute when James Keatings got on the end of Mickael Antoine-Curier's cross to bundle in from close range.
But it was the hosts who emerged victorious, as Graham steered the ball past Kevin Cuthbert from six yards out in the 71st minute.