Drake has begun legal action against Universal Music Group and Spotify, alleging they conspired to falsely pump up the popularity of Kendrick Lamar’s “Not Like Us.”

The Drake and Kendrick Lamar flame has largely fizzled for now—but a new legal threat by Drake could reignite the feud.

Musician Drake alleges that Universal Music Group “conspired” to artificially boost Kendrick Lamar’s searing diss track “Not Like Us” on Spotify, according to a pre-action petition submitted to a New York court on Monday.