Please revert https://github.com/tdewolff/minify/commit/dc25ed9e803528609803bf63b08f42171e92f53a. This change was prompted by [#692](https://github.com/tdewolff/minify/issues/692). If I had seen the issue I would have pushed back on the OP. Source maps are for development environments, where you never minify. As always, thank you for your consideration.