YouTube is starting to crack down on Discord music bots. The search giant has sent a cease and desist to the owners of the popular Groovy Bot, which lets Discord users play music from YouTube videos and is installed on more than 16 million Discord servers – according to The Verge.

A YouTube spokesperson writes, “We notified Groovy about violations of our Terms of Service, including modifying the service and using it for commercial purposes.” And Groovy is complying by shutting down its bot on August 30th.

“Groovy has been a huge part of my life over the past five years. It started because my friend’s bot sucked and I thought I could make a better one,” says Nik Ammerlaan, Groovy Bot owner, in a message announcing the closure.