The 21-year-old initially joined for a month and has made two appearances for the Imps, scoring twice in a 3-1 victory over Welling in the FA Trophy.
Ward's stay at Sincil Bank will now run until 14 April, and will take his loan to the maximum 93 days.
Danny Cowley's Lincoln are currently top of the National League.
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Brighton & Hove Albion winger Joe Ward has extended his loan deal at National League side Lincoln City for a further two months.