The sell-out crowd witnessed a game with plenty of hard work, fouls and competitivenes, while there was a lack of quality at times.
Ian Harkes came up with the defining moment, turning on the edge of the box to fire past Adam Legzdins. There were some big performances for the Tangeroines, especially in defence and midfielder Jeando Fuchs.
It is the latest big win for Thomas Courts this season after victories over double winners St Johnstone and Scottish champions Rangers.
How did the United players rate out of ten?
Player ratings scale - 10: One of the best performances you've seen. 9: Outstanding. 8: Very good. 7: Good. 6: Average. 5: Poor, 4: Very poor. 3: A terrible day at the office. 2: Abysmal. 1: One of the worst performances you've seen.
9. Ian Harkes - 7
Bagged the winning goal with nine minutes left. Floated around the final third trying to spark United into life. Photo: Ross Parker - SNS Group
10. Peter Pawlett - 6
Hit the post late in the first half and always looking to get involved without making serious inroads. Photo: Paul Devlin - SNS Group
11. Marc McNulty - 6
Had a couple of half-chances and was lively enough up front, but starved off service for clear-cut opportunities. Photo: Alan Harvey - SNS Group
12. Dylan Levitt - 6
One really nice pass nearly set United on their way. Added a bit of composure to midfield. Photo: Craig Foy - SNS Group