# Compatibility and deprecation

pyglet 1.1 is backward compatible with pyglet 1.0. Any application that uses only public and documented methods of pyglet 1.0 will continue to work unchanged in pyglet 1.1. If you encounter an issue where this is not the case, please consider it a bug in pyglet and file an issue report.

Some methods have been marked deprecated in pyglet 1.1. These methods continue to work, but have been superceded by newer methods that are either more efficient or have a better design. The API reference has a complete list of deprecated methods; the main changes are described in the next section.

- Continue to use deprecated methods if your application needs to work with pyglet 1.0 as well as pyglet 1.1.
- New applications should not use deprecated methods.

Deprecated methods will continue to be supported in all minor revisions of pyglet 1.x. A pyglet 2.0 release will no longer support these methods.