If you use your Apple ID to log in to Fortnite, you’d better change your details fast. 

Epic Games has announced players won’t be able to use Sign In with Apple to access their accounts from Friday — the latest development in the ongoing feud between the Fortnite developer and Apple.

Apple ID credentials will stop working with Epic Games accounts from Sept. 11, according to a Wednesday post on the developer’s website. Though Fortnite has been at the center of Apple and Epic Games’ dispute, this change impacts anyone who uses the Epic Games Store to purchase or play any game, not just those who enjoy the popular battle royale title.

Players who currently use their Apple ID to sign in to Epic Games will have to update the email on their account to avoid getting locked out, as well as setting up a password if they haven’t already done so. You can currently do this by logging in to the Epic Games website with your Apple ID and navigating to the General Settings and then Password & Security pages.

Do this as quickly as possible, but don’t freak out too much if you miss the deadline. Epic Games has said it might be able to manually recover your account if you contact them, though it will obviously be a longer process.

Exactly why Apple ID will stop working with Epic Games accounts is unclear. Epic Games appeared to place the blame on Apple, stating that “Apple will no longer allow users to sign into Epic Games accounts using ‘Sign In with Apple’.” 

However, Apple told Mashable it is not taking any action to prevent Epic Games from using Sign In with Apple. 

Mashable has reached out to Epic Games for comment.

Epic Games has been fighting with both Apple and Google since mid-August, when it updated Fortnite to bypass both app stores’ in-app payment systems. This, of course, violated the tech giants’ terms of service, prompting both to boot Fortnite from their stores. 

Epic Games responded by filing lawsuits against both companies, claiming they maintain an unfair, anti-competitive monopoly on app distribution and in-app transactions. 

Apple countersued for breach of contract this week.