Chris Westwood's header in first-half stoppage time gave Wycombe a 1-0 victory at Barnet - their first win at Underhill since 1985.
The home side could have opened the scoring inside the first minute when Mark Marshall was denied by Marvin McCoy's block and Clovis Kamdjo later saw a goalbound header superbly kept out by Nikki Bull.
Westwood sealed the points when he was left unmarked to nod home Matt Bloomfield's corner just before the break, but the visitors were indebted to more saves from Bull in the second period.
Izale McLeod was denied in a one-on-one situation while Wycombe had chances on the break, with Kevin Betsy and Scott Rendell coming close before the final whistle.
Captain Gareth Ainsworth returned to the starting XI at the expense of Scott Rendell in the only change for the short trip to Hertfordshire.
Buoyed by their point at promotion hopefuls Rotherham United on Saturday, Barnet started on the frontfoot and only a block from Marvin McCoy denied Mark Marshall giving the hosts the lead inside the first minute.
Paul Fairclough's men continued to edge the opening exchanges, however, Wanderers were the next to threaten when a poke goalwards by Stuart Beavon was smothered by Jake Cole after Kevin Betsy's teasing cross had caused problems in the Barnet box.
Not for the first time this season, Wycombe were grateful to Nikki Bull for keeping them on level terms five minutes later when he pulled off a stupendous save from Clovis Kamdjo's header. The rebound fell to Rossi Jarvis, who headed his effort against the bar from six yards before brave play from McCoy aided a Wycombe clearance.
The game really began to open up around the 30-minute mark with both sides pushing men forward in search of the opening goal. Wycombe had chances through Stuart Lewis and Matt Bloomfield, while, at the other end, Mark Byrne was denied by a smart save from Bull after being fed by the lively Izale McLeod.
After riding their luck at times, Wanderers made their opponents pay for their missed opportunities on the stroke of half-time when Chris Westwood headed home Matt Bloomfield's inswinging corner. The centre-back rose highest to direct his effort into the bottom left-hand corner past Jake Cole - his first goal in the light and dark blue quarters since December 2009.
They were gifted a golden chance to level within five minutes of the restart when Stuart Lewis' underhit backpass to Nikki Bull was seized upon by Izale McLeod, but the striker's shot was superbly saved as he looked to slot the ball into the corner.
The same combination were in action moments later when McLeod fired goalwards from a tight angle, with Bull denying him once again with a smart block, before the keeper was again called upon to keep out Mark Marshall's diving header which had looked destined for the net.
Wycombe needed an attack of their own to alleviate the pressure and they rode the storm before Kevin Betsy had a good chance to break following a good challenge by Danny Foster set him free, although the winger could only fire over the top from 25 yards.
The introduction of Matt McClure as a substitution seemed to be the catalyst in an improved and more assured display from the visitors, and he was involved in a series of moves which created openings, although the lead remained at just one goal.
McClure was then put through in the area but his heavy touch allowed keeper Jake Cole to narrow the angle and make the block, and from the resulting corner, Scott Rendell sent a glancing header against the crossbar.
Rossi Jarvis saw red in the closing stages for collecting a second yellow card following a foul on Chris Westwood and despite a late succession of long balls into the Wycombe box, the visitors held on for a solid three points which strengthens their position in the top three.