Lincoln edged closer to safety with a goalless draw against Cambridge.
Nathan Blissett headed wide from a corner for the visitors and Nat Brown almost nodded into his own net as the U's finished a poor first half on top.
The hosts were much brighter after the break and Vadaine Oliver flashed an effort narrowly over the bar before nodding another chance wide but neither side could break the deadlock.
The point gives the Imps a four-point cushion above the relegation zone.
VIEW FROM THE DRESSING ROOM
Lincoln City manager Gary Simpson told BBC Radio Lincolnshire:
"The pitch was as dry as a bone and it was bobbly, we couldn't get the ball down in the final third and open them up like we wanted to. It wasn't a classic game but the positives were that we kept another clean sheet and it's another point closer to where we want to be.
"In the first half they were a bit better than us but we had a word at half-time and I thought we got to grips with them better [in the second half]. We're disappointed that we didn't win but they were a solid, strong team and it was a hard battle and a draw was probably a fair result.
"I don't think it's an outstanding league which is why everyone's still in it [a relegation battle], so I think we need certainly one more win.
"Three points might do but I've laid down a challenge to the players to go unbeaten to the end of the season."
Live Text Commentary
Full Time The referee blows for the end of the match.90:00 +3:44
The official flags Sam Smith offside. Paul Farman restarts play with the free kick.90:00 +2:19
Tony Diagne fires a strike on goal direct from the free kick.90:00 +2:19 Booking
Booking Booking for Rory McAuley for unsporting behaviour.90:00 +2:14
Foul by Rory McAuley on Jamie Taylor, free kick awarded.90:00 +1:34
Free kick taken by Nick Pope.90:00 +1:34 Booking
Booking Booking for Todd Jordan.90:00 +1:28
Foul by Todd Jordan on Sam Smith, free kick awarded.90:00 +1:06
Sam Smith gives away a free kick for an unfair challenge on Jamie Taylor. Free kick taken by Tom Miller.90:00 +0:15 Booking
Booking Sam Smith receives a yellow card.89:10
Tom Miller challenges Tom Elliott unfairly and gives away a free kick. Kevin Roberts restarts play with the free kick.87:35
Outswinging corner taken by Jamie Taylor from the right by-line.86:12
Mamadou Fofana concedes a free kick for a foul on Tom Elliott. Kevin Roberts restarts play with the free kick.83:05
Inswinging corner taken right-footed by Tom Shaw from the right by-line.76:50
Free kick awarded for an unfair challenge on Tom Elliott by Mamadou Fofana. Nick Pope restarts play with the free kick.76:23 Booking
Booking The referee books Mamadou Fofana for unsporting behaviour.75:09 Substitution
Substitution Craig Hobson replaces Paul Turnbull.75:09 Substitution
Substitution Mamadou Fofana comes on in place of Alan Power.72:57
The assistant referee signals for offside against Jamie Taylor. Free kick taken by Nick Pope.71:36
Free kick awarded for a foul by Nathan Blissett on Andrew Boyce. Jamie Taylor takes the direct free kick.
Liam Hughes shoots direct from the free kick.70:17 Booking
Booking Andrew Boyce is shown a yellow card.69:31
Andrew Boyce concedes a free kick for a foul on Nathan Blissett.65:35
Vadaine Oliver challenges Charlie Wassmer unfairly and gives away a free kick. Nick Pope takes the direct free kick.60:36
Free kick awarded for an unfair challenge on Tom Miller by Rossi Jarvis. Direct free kick taken by Tom Miller.56:05
Inswinging corner taken from the right by-line by Nathaniel Brown.55:23
Effort from deep inside the area by Vadaine Oliver misses to the right of the target.50:57
Corner taken by Alan Power, clearance by Nick Pope.50:09
The official flags Nathan Blissett offside. Paul Farman restarts play with the free kick.49:00
Foul by Tom Elliott on Tom Miller, free kick awarded. Alan Power takes the free kick.47:25
Todd Jordan produces a left-footed shot from the edge of the box and misses to the left of the goal.45:47
Harrison Dunk fouled by Tom Miller, the ref awards a free kick. Nick Pope takes the free kick.45:01
The match restarts for the second half.45:00 +2:09 Half time
Half Time The referee calls an end to the first half.44:20
Free kick awarded for a foul by Tom Shaw on Alan Power. Free kick taken by Paul Farman.40:19
Inswinging corner taken by Harrison Dunk from the right by-line, clearance made by Tom Miller.38:43
Inswinging corner taken by Tom Shaw, Vadaine Oliver makes a clearance.38:25
Corner taken right-footed by Harrison Dunk, Tom Miller manages to make a clearance.37:45
Inswinging corner taken by Harrison Dunk, Tom Miller manages to make a clearance.32:30
Foul by Vadaine Oliver on Charlie Wassmer, free kick awarded. Nick Pope restarts play with the free kick.30:10
Corner taken by Harrison Dunk.28:02
Todd Jordan fouled by Rossi Jarvis, the ref awards a free kick. Nathaniel Brown takes the direct free kick.24:31
Shot by Rory McAuley from deep inside the penalty area misses to the right of the goal.21:27
Tom Shaw has an effort at goal from outside the area which goes wide right of the goal.21:14
Vadaine Oliver gives away a free kick for an unfair challenge on Nick Pope. Direct free kick taken by Nick Pope.16:34
Free kick awarded for an unfair challenge on Alan Power by Rossi Jarvis. Tom Miller takes the free kick.15:05
Jamie Taylor is caught offside. Direct free kick taken by Nick Pope.12:17
Free kick awarded for a foul by Todd Jordan on Tom Elliott. Kevin Roberts restarts play with the free kick.11:08
Free kick awarded for a foul by Alan Power on Liam Hughes. Nick Pope restarts play with the free kick.9:28
Inswinging corner taken right-footed by Harrison Dunk, Charlie Wassmer has a headed effort at goal from close in which goes wide right of the target.8:18
Nathan Blissett gives away a free kick for an unfair challenge on Nathaniel Brown. Free kick taken by Paul Farman.0:57
Vadaine Oliver takes a shot. Save by Nick Pope.0:00
The referee gets the match started.
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