I have Acer Chromebook 13 CB5-311 It says the OS is up to date buts not

CynDu
CynDu Member Posts: 6 New User
I have Acer Chromebook 13 CB5-311 It says the OS is up to date : Your Chromebook is up to date   
Version 77.0.3865.120 (Official Build) (32-bit) but I'm being rejected from websites for being out of date. Is this the last update? I can't find any info.

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