Doncaster Rovers loanee is a free agent this summer after being released by League One club
The 27-year-old forward has been an important part of the upsurge in form which has taken Rovers into the League Two play-offs, scoring nine goals in 19 appearances.
It is the second time Adelakun has worked with manager Grant McCann, who also took him on loan from Bristol City as manager of then-League One Hull City.
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Hide AdAdelakun joined Lincoln on a free transfer in July 2021, but has only made 22 league starts for the Imps, scoring five goals.
Rovers, unbeaten in their last 12 matches having won 10 of them, face Crewe Alexandra in the play-off semi-finals, away on Monday with the return leg on Friday.
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