Mathias Pogba's solo strike saw Wrexham bounce back from their 7-2 thrashing at the weekend to stun leaders AFC Wimbledon and climb up to third.
Pogba finished off a slick move 14 minutes from time rounding keeper Seb Brown for his fourth of the season.
Andy Mangan earlier came close for the Welsh side hitting the side netting.
Wrexham keeper Chris Maxwell made a fine double save from Danny Kedwell's 25-shot and Kirk Hudson's rebounded header from six yards.
AFC Wimbledon: Seb Brown, Hatton, Stuart, Johnson, Gwillim, Mulley (Broughton 72), Gregory, Yussuff, Hudson (Franks 81), Kedwell, Jolley (Jackson 63). Subs Not Used: Turner, Yakubu.
Booked: Jackson.
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Wrexham:
Maxwell, Obeng, Blackburn, Sinclair, Ashton, Harris, Creighton, Fowler, Pogba (Cieslewicz 86), Taylor (Knight-Percival 80), Mangan (Andrews 90). Subs Not Used: McMillan, Tolley.
Booked: Obeng, Taylor, Harris, Ashton.
Goals: Pogba 76.
Att: 3,486
Ref: Andy Hendley (West Midlands).
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