John Mayer is Working With The Grateful Dead's Bob Weir

John Mayer keeps it cool in a leather jacket while heading inside LAX Airport for his departing flight on Tuesday (May 12) in Los Angeles.

The 37-year-old musician is reportedly set to work with The Grateful Dead‘s Bob Weir on an upcoming project.

PHOTOS: Check out the latest pics of John Mayer

Though, Bob kept mum on details. “There’s nothing I can say about that right now,” he told Relix.com.

Earlier in the month, John was spotted hitting up an after-party for the 2015 Met Gala with his girlfriend Katy Perry at The Standard Hotel in New York City.