This is a great, tidy little package, thanks!

I ran into the 255-character old_path/new_path length limit in my application.

URLs can be much longer than 255 characters (see, e.g. https://stackoverflow.com/questions/417142/what-is-the-maximum-length-of-a-url-in-different-browsers).

I think a safe-enough limit is ~2000. I have a PR incoming for this shortly that sets the limit to 2048 that you can merge if you'd like, otherwise I have to run my application off my fork.