How to let the json file (*.json) return response header: 'application/json', instead of 'application/json; charset=UTF-8'

[helloint]

Environment Versions

1. OS Type macOS
2. Node version: $ node --version v12.22.12
3. http-server version: $ http-server --version v14.1.1

Steps to reproduce

I have a json text file and start http-server

http-server ./public -c-1 -p 3000 --cors

What I got is: application/json; charset=UTF-8

How can I just let it return application/json?
I'm using latest http-server version, but I checked the source code, looks like this issue has been there from the very beginning.

Expected result

application/json

Actual result

application/json; charset=UTF-8

Thanks.

[github-actions]

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