Apple Watch Series 4 got the watchOS 5.3.2 update on Wednesday. It is a security update for users that do no have devices that support iOS 13/watchOS 6 (via 9to5Mac).

Apple Watch4 Infograph, Walkie Talkie, and SOS screens

Apple 4 Gets Same Update as Previous Models

The update had previously been rolled out to the Apple Watch Series 1, 2, and 3. According to the Apple Support page, it patched a vulnerability that meant a “remote attacker may be able to cause unexpected application termination or arbitrary code execution.” The patch meant “an out-of-bounds read was addressed with improved input validation,” the page said.

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There are series 4 watches that don’t support Watch OS 6? I suspect this is more for series 4 owners that have phones which don’t support IOS 13.