Iain Vigurs scored his second goal in as many games as Inverness beat Dumbarton 1-0 to move up to fifth in the Ladbrokes Championship table.The visitors were on top in a goalless first half, with Vigurs and Liam Polworth looking particularly dangerous going forward.Vigurs put Inverness ahead 11 minutes after the break when he unleashed a left-footed shot from just inside the area which flew into Scott Gallacher's net.Both teams created chances late on but Caley Thistle held on to secure all three points.