Gem Vulnerability in Webrick Gem: Version Mismatch and Seeking Clarification

I got a gem vulnerability in my project in the webrick gem. It is saying me to update the gem to version >= 2.2.8 whereas when I am checking All versions of webrick | | your community gem host, I can see the maximum version of the gem is 1.8.1. Attached here are the screenshots. Am I missing something or looking at the wrong place?