CD Projekt Red is working on a new Witcher 3: Wild Hunt patch that will, among other things, address performance on PlayStation 4 and implement a range of bug fixes. Writing on the game’s forums, community manager Marcin Momot said the upcoming patch, 1.09, will include a “massive” number of changes, though the full changelog has not yet been published.

“The patch is on the way,” he explained. “Was just looking at the changelog and it looks really impressive– the list of changes is massive. The update will bring a lot of fixes and improvements including PS4 performance (as well as other platforms) plus many more. We ask for a bit more patience.”

A release date for the 1.09 patch was not announced. Releasing it in October alongside The Witcher 3’s first expansion, Hearts of Stone, would seem likely, but this is not confirmed.

Hearts of Stone launches on October 13. GameSpot recently played a chunk of the expansion, which is expected to add around 10 hours of gameplay and you can read an excerpt from our preview below.

“Hearts of Stone is full of varied quests to follow, and striking characters to meet,” editor Mike Mahardy wrote. “It’s also well paced, a facet that’s hard to come by in an open-world RPG, wherein players have every chance to venture off the beaten path.”