# PR Against the Correct Branch! Amp development spans two primary branches. PHP 5.x compatibility takes place in the v1.0.x branch. All contributions to this branch must retain compatibility with PHP 5.5+. The master branch supports only PHP7+ and is aliased as v1.1.0-dev . Please submit PRs against the appropriate branch. ## Licensing Any contribution intentionally submitted for inclusion in the Amp project shall be under the terms and conditions of the MIT License, without any additional terms or conditions. Not withstanding the above, nothing herein shall supersede or modify the terms of any separate license agreement you may have executed with the Amp project (or its licensor Daniel Lowrey) regarding such contributions.