Is ZenFone 2 551ML updatable from OS 5.0

My ZenFone 2 551ML running OS 5.0. Is not compatible with my bank app PNC. Is it possible to update the OS to something later?
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My ZenFone 2 551ML running OS 5.0. Is not compatible with my bank app PNC. Is it possible to update the OS to something later?
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Hi digitaljockey
Thank you for your asking. The last firmware version of ZE551ML is Android 5 WW-2.20.40.206. Sorry for any inconvenience it may be caused.
https://www.asus.com/us/Phone/ZenFone_2_ZE551ML/HelpDesk_BIOS/