Lincoln came from behind to beat fellow strugglers Tamworth and edged closer to Blue Square Bet Premier safety.
The Lambs had taken an early lead when Lee Hendrie's cross was headed into his own net by Daniel Gray.
The Imps pressed for an equaliser and saw Nathaniel Brown's flick cleared off the line, but they drew level when Jamie Taylor turned in Gray's cross.
And the hosts won it through Alan Power's penalty after Sam Oji had fouled Jake Jones in the box.
Lincoln's win moves them four points clear of the relegation zone, and two points above Tamworth, who lie 20th.
VIEW FROM THE DRESSING ROOM
Lincoln City manager Gary Simpson told BBC Radio Lincolnshire:
"I thought the lads were superb from start to finish. I felt we played quite well in the first half and were unlucky to go a goal behind, but they kept going as well and defended quite well but we came out in the second half and had another good go and deserved it.
"I said to the players at half-time that the fans had been with us all the way through the first half and to keep giving them something to get behind us with. They did that, the pressure mounted and Tamworth cracked.
"What's going to be is going to be. After Tuesday [when Gateshead play Stockport] we'll know what we're going to need. We're three points closer to where we want to be but we're not there yet."