Generate certificate for addresses with port like 127.0.0.1:5555

[KevinGIRAULT]

Hi,
I'm using the awesome VS Code Five Server addon https://github.com/yandeu/five-server-vscode and it generates a localhost with ports, for example 127.0.0.1:5555
However, mkcert seems to work only with the default port. I tested mkcert localhost 127.0.0.1 ::5555, both on Firefox and on Chromium (after restarting the browsers) and the page does not load when I add https.

Is there a solution, please?
Thank in advance.