In 2015 the band played Indietracks, headlined the 100 Club, and released a new EP, Good Luck. In 2016, they toured Europe in the spring, and supported Chameleons Vox on a UK tour in August, as well as recording their second album.
Grow Up was released in March 2017, backed by a headline tour of the UK and Germany, including a date at Scala. The first single, Hollow, was released in October 2016. It was reviewed well by Stereogum, and was picked out as Song of the Day by KEXP. Second single, Resolution, about New Year's Eve parties, was released on 1 January 2017 and was playlisted by BBC Radio 6 Music.
Third single, Be Kind, was released in March 2017, two weeks before the album. It was playlisted by Virgin Radio UK. The fourth single, Why Are You So Boring?, a 'protest song about tossers' was released in June 2017. The band toured throughout 2017 making summer festival appearances at Wave-Gotik-Treffen, Tramlines, and Benicàssim, and supporting the Slow Readers Club on tour in November.