README.md in purl_fetcher-client-0.5.0 vs README.md in purl_fetcher-client-1.0.0

- old
+ new
@@ -34,6 +34,6 @@
 
 Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/purl_fetcher-client. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [Contributor Covenant](http://contributor-covenant.org) code of conduct.
 
 ## Code of Conduct
 
-Everyone interacting in the PurlFetcher::Client project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the [code of conduct](https://github.com/[USERNAME]/purl_fetcher-client/blob/master/CODE_OF_CONDUCT.md).
+Everyone interacting in the PurlFetcher::Client project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the [code of conduct](https://github.com/[USERNAME]/purl_fetcher-client/blob/main/CODE_OF_CONDUCT.md).