Scott McDonald booted home his 20th Scottish Premier League goal of the season to help Celtic beat Gretna 3-0.
McDonald converted a flick from Jan Vennegoor of Hesselink to open the scoring just before half-time.
Soon after, Vennegoor of Hesselink missed with a close range header, but he made up for it by heading home Celtic's second in the 69th minute.
Georgios Samaras netted a late third for the visitors to end Celtic's run of four games without a win.
The triumph puts Celtic just three points behind table-toppers Rangers, although they've played one more match than their rivals, who they'll face on Saturday.