Short version for non-lawyers: This Project is dual-licensed under Apache 2.0 and MIT terms. Longer version: This project is copyright 2015, Jerome Rasky. This project is copyright 2021, Jen-Chieh Shen. Licensed under the Apache License, Version 2.0 or the MIT license , at your option. All files in the project carrying such notice may not be copied, modified, or distributed except according to those terms.