A club statement read: "Paris Saint-Germain is happy to announce it has triggered the option to buy clause for Serge Aurier. The Côte d'Ivoire international has signed a contract with the club until June 2019."
The 22-year-old wingback, who shone at last year's FIFA World Cup™ and helped the Ivorians win the CAF Africa Cup of Nations earlier this year, has made a total of 14 appearances for PSG this season, scoring one goal.
Aurier did not feature as Laurent Blanc's side beat Metz 3-1 on Tuesday to move three points clear of Lyon at the top of Ligue 1 with three rounds remaining.