Deadspin says it has signed a record-setting deal to promote a fight between boxing superstar Floyd Mayweather and UFC lightweight champion Conor McGregor.

Now, the website says, it’s up to Mayweather and McGregor to do the same to make the fight happen.

“The first and most important part of this historic contract has now officially been signed off on,” Deadspin editor Tim Marchman said in a statement to Deadspin. “Congratulations to all parties involved. We now await the signatures of [Mayweather adviser] Al Haymon and his boxer as well as of [UFC figurehead] Dana White and his fighter in the coming days.”

Backing the site’s claims, Marchman tweeted out a copy of the contract Thursday: