Prefix icw dontRenameFile doesn't seem to work

[FedWiebe]

I want to prefix all my relative paths in an index.html file and I want to revision the filenames to those .js en .css files as well.
But I don't want to rename the index.html file itself.

With this RevAll statement, the prefix isn't working. When I remove index.html from the dontRenameFile array it works, however the index.html file is renamed.

.pipe(RevAll.revision({
            prefix: 'https://www.example.com/',
            dontRenameFile: ['index.html']
        }))

Bug or am I missing something?
Thanks!