The score was composed by Ennio Morricone, who was due to begin the intense recording session on 17 July 2016. It was to be completed by 21 July. The score is being performed by the Czech National Symphony Orchestra.
According to Czech Radio, the orchestra had recently completed a three-month tour with Morricone. The composer previously worked with the Czech National Symphony Orchestra on the 2013 Italian film, The Best Offer.