John Marquis' red-hot start to life as a City player continued with his third goal in as many games, but it was not enough to ensure his side took something from the trip to MK Dons
Marquis' smart near-post finish after just eight minutes gave the Imps a deserved early lead as he turned home Anthony Scully's cross.
But Harry Darling and Warren O'Horo struck to give the home side all three points.
Check out our best images from the match above.
Attendance: 8,723 (1,300 away)