Langerak made his debut for Australia's senior team in an international friendly against France on 12 October 2013, a match in which the Socceroos were thrashed 6–0. This match turned out to be manager Holger Osieck's final match in charge of Australia, with his sacking coming shortly after the conclusion of the match. Langerak made his second appearance for Australia against Canada, a match which Australia won 3–0.. Langerak was included in the 23 man squad going to Brazil for the 2014 FIFA World Cup. He was also included in Australia's final list for 2015 AFC Asian Cup, which was held in Australia, but he didn't play a single match.
