AC1750 Devices are saying my security is weak

[SJ2006]

My devices are showing weak security. Says I should use wpa2 or wpa3. How do I change my router to this.

[plemans]

The C6300 wont' support wpa3. Its a new standard and would require new hardware. 

You can change the wireless security settings through the wireless settings in the browser. 

https://kb.netgear.com/23439/How-do-I-change-my-NETGEAR-router-s-WiFi-password-or-network-name-SSID