Boston Town were beaten 2-1 at Northampton Spencer on Saturday.
Ryan Parnell put the Poachers ahead in the 35th minute, only for Ryan Dove to level things up two minutes later.
Just as Jason Callaby’s side looked likely to earn a point, Luke Stone earned victory for the hosts with an 87th-minute finish.
The result leaves Town 18th in the UCL Premier.
Town host Kirby Muxloe on Saturday at the DWB Stadium (KO 3pm).