Plymouth kept their slim survival hopes alive with a narrow victory over play-off chasing MK Dons.
Simon Walton put the Pilgrims ahead with a 21st-minute free-kick from the left after a foul by Dons defender Sean O'Hanlon on winger Yannick Bolasie.
Walton swung in his free-kick from 25 yards and the flight deceived Dons goalkeeper David Martin, as well as eluding Plymouth striker Rory Fallon.
The win puts Plymouth just three points from safety with three games remaining.
Plymouth Argyle manager Peter Reid told BBC Radio Devon:
"I thought they were the better side, but my keeper made a couple of absolutely fantastic saves, David Button, absolutely brilliant saves.
"We got a break today, I thought we deserved to win at Peterborough and possibly we got a bit of luck today but sometimes fortune favours the brave, and we were brave.
"We've got some tough fixtures coming up, a local derby and then Southampton and then Leyton Orient, but we're still in there with a shout."
MK Dons manager Karl Robinson told BBC Three Counties Radio:
"I can't fault the attitude of the players and how hard they're working and it hurts me because I can't ask for more.
"We missed four or five chances today and when you're on top you've got to take them and that's the most disappointing thing today.
"You've got to move on but I'm really happy with them and we'll regroup this week and look forward to a tough game against Notts County."