El-P and Killer Mike have revealed that they’re working with Rick Rubin on the forthcoming Run The Jewels album, RTJ4, Consequence of Sound reports.

The announcement came via the duo’s newsletter, where RTJ shared that they had recently made a stop at Rubin’s Los Angeles studio so they can “keep shit moving.”

“We’ve been going hard on RTJ4 and have a genuine excitement to share new music with you all. We stand behind our statement that this record is going to punch you in the fucking face and burn everything in its path,” the duo declared. “We thank you for your continued patience as we put together what we believe will be our best record yet.”

Back in December, El-P shared that the project was on its way and would “probably” arrive in summer 2019. In a since-deleted tweet, he wrote, “oh and at the risk of losing the mystery of it all, RTJ4 will probably hit around summer time. i’m sorry if that schedule disappoints anyone but we need the time to make sure the music doesn’t.”

Last October, during an interview with Zane Lowe, RTJ claimed their next album would be their most “grimiest, rawest record” yet. Their last studio album, RTJ3 dropped in December 2016.