Asus has started pushing out a new update to its Zenfone 3 Laser (ZC551KL) smartphone. Arriving as version V18.104.22.168, the update brings along Android 7.1.1 Nougat. It's worth mentioning the phone first received the Nougat update (Android 7.0) in April.
Sadly, the update's official announcement doesn't say what else is included, although some usual improvements/enhancements and bug fixes could well be there. As is usually the case with OTA roll outs, it might take some time for the update to hit your device.