Microsoft is bringing Windows 11 to its HoloLens 2 headset. The update will be available free of charge, and Microsoft says it should appear by the end of June as an optional upgrade. HoloLens 2 owners can continue to use Windows 10, but Windows 11 will offer better app performance and some key developer-focused additions. “The free upgrade to Windows 11 promises continuous platform support, meaning our customers can trust in the continued security of their devices,” explains Robin Seiler, Microsoft’s corporate vice president of Windows and devices, in a blog post. “With the upgrade, HoloLens 2 users will continue to receive monthly security servicing updates that reinforce the protection of sensitive information while also improving app performance.” While the update doesn’t appear to bring any big user-facing updates outside of app performance improvements, there’s a key developer addition that should help improve apps. Microsoft has also improved its Dynamics 365 Guides feature on HoloLens 2. A new annotation feature that lets HoloLens 2 users apply 3D drawings anywhere to freely illustrate during video calls.