The midfielder was barracked by some Leeds supporters after being subbed during the 3-0 home defeat to Middlesbrough in January.
Johnson, 24, was told to up his game and he has since given top displays against Liverpool, Manchester United and Wolves.
Johnson said: "It is not nice getting booed by your own fans.
"So it is good to get a run in the team now and, hopefully, I can win a few people over."