Lincoln City manager David Holdsworth says he wants his striker Jamie Taylor to become more aggressive.
Taylor saw yellow in the Imps' FA Cup fourth qualifying round win at Halifax, and Holdsworth was pleased to see that side of the 29-year-old's game.
"I'm glad he got booked - he's too nice at times," Holdsworth told BBC Lincolnshire.
"I want him to have that little streak inside of him and I've been encouraging him to become more aggressive."
Holdsworth added: "It's part of his game that's not natural, but he's doing a wonderful job up front leading the line for us and I think his game has improved."
Meanwhile, fellow striker Jordan Thomas, 17, has signed a two-year professional contract at Sincil Bank after coming through their centre of excellence.
Thomas became the Imps' youngest ever player in a competitive game when he came on as a substitute against Mansfield last year and has taken the vacant number 29 shirt.