The 21-year-old has failed to become a regular at PSG since joining the club from Sao Paulo in January 2013.
The young midfielder has recently been linked with the likes of Fluminense and Sao Paulo.
"I am very happy playing for a great team that have a huge and wonderful project to become one of the greatest teams in the world," he told Sportv.
"Playing for a big European club is a dream come true for me. I have a career plan at PSG and I intend to remain here for a long time and help the club more and more.
"I want to grow even more, learn even more - everything is new to me. I know what I am capable of, I know my potential.
"I am learning a lot here, playing alongside great players. That's what matters to me."