Kevin van Veen was Motherwell's hero again as his second-half penalty winner against 10-man Livingston gave his side back-to-back Premiership victories.
The Dutchman struck in 68 minutes after a corner kick from the left was judged to have struck a Livingston defender's arm and he stepped up to ram in his third goal of the season.
Livingston made it easier for their hosts when sub Dylan Bahamboula was shown two yellow cards inside three minutes, reducing them to 10 men with 13 minutes left.