 On 29 May 2017, Huddersfield secured promotion to the Premier League for the 2017–18 season, following a victory on penalties in the play-off final against Reading.On 30 June 2017, Wagner signed an improved two-year contract.He was praised for his achievements in keeping Huddersfield in the Premier League at the end of the 2017–18 season, a feat regarded by bookmakers as improbable and described by "The Guardian" as "the Premier League's greatest survival story", with Wagner in particular noted as a leader of rare charisma and intelligence."