The Grateful Dead recently celebrated the 50th anniversary of their debut studio album by issuing an anniversary edition of the self-titled 1967 LP. Guitarist John Mayer has honored the occasion by taking out a full page ad in the latest issue of Billboard.

The Dead & Company axeman accompanied an image of the Dead’s Steal Your Face logo with a brief note that reads, “To the band that changed my life, and for their music that keeps on coloring it in: Congratulations on the 50th anniversary of your debut album.” He signed the note/advert with “Forever Grateful, John Mayer.” Dead & Company features Grateful Dead members Bob Weir, Bill Kreutzmann and Mickey Hart joined by Mayer, Jeff Chimenti and Oteil Burbridge. The group returns to the road in late May.

Here’s an image of the ad thanks to @TweeterReprise: