diff --git a/wiegand.go b/wiegand.go
index 97c9f96..255155e 100644
--- a/wiegand.go
+++ b/wiegand.go
@@ -113,14 +113,14 @@ func WiegandSetup(a int, b int, bitTimeout time.Duration, solenoid int) *Wiegand
 	}
 
 	wa, err := gpiod.RequestLine("gpiochip0", a, gpiod.AsInput,
-		gpiod.WithFallingEdge, gpiod.WithEventHandler(wiegand.wiegandAEvent))
+		gpiod.WithFallingEdge, gpiod.LineBiasPullUp, gpiod.WithEventHandler(wiegand.wiegandAEvent))
 	if err != nil {
 		panic(err)
 	}
 	wiegand.aLine = wa
 
 	wb, err := gpiod.RequestLine("gpiochip0", b, gpiod.AsInput,
-		gpiod.WithFallingEdge, gpiod.WithEventHandler(wiegand.wiegandBEvent))
+		gpiod.WithFallingEdge, gpiod.LineBiasPullUp, gpiod.WithEventHandler(wiegand.wiegandBEvent))
 	if err != nil {
 		panic(err)
 	}