Dumbarton have been promoted to cinch League 1 after a 4-3 aggregate success over The Spartans and following their semi-final victory against Stirling Albion.
Stevie Farrell's side led 2-1 from the first leg on Tuesday and it finished 2-2 at Ainslie Park.
Cammy Russell gave Spartans an early lead but a Michael Ruth double had the Sons in control before Blair Henderson equalised with a stoppage-time penalty.