I'm happy to announce that a new major version of Celery has been released! To see the complete list of changes go here: [http://docs.celeryproject.org/en/latest/whatsnew-4.0.html](https://link.nylas .com/link/c6kbuz4icejw17oc3qqi6syrm/local-d891639d-1557/0?redirect=http%3A%2F% 2Fdocs.celeryproject.org%2Fen%2Flatest%2Fwhatsnew-4.0.html&r=cHl0aG9uLWFubm91b mNlLWxpc3RAcHl0aG9uLm9yZw==) This is a massive release with over two years of changes. Not only does it come with many new features, but it also fixes a massive list of bugs, so in many ways you could call it our "Snow Leopard" release. The next major version of Celery will support Python 3.5 only, were we are planning to take advantage of the new asyncio library. This release would not have been possible without the support of my employer, Robinhood (we're hiring! [http://robinhood.com](https://link.nylas.com/link/c6kbuz4icejw17oc3qqi6syrm /local-d891639d-1557/1?redirect=http%3A%2F%2Frobinhood.com&r=cHl0aG9uLWFubm91b mNlLWxpc3RAcHl0aG9uLm9yZw==)). It's important that you read the "What's new in Celery 4.0" document before you upgrade, and since the list of changes is far too big to put in an email you have to visit the documentation: [http://docs.celeryproject.org/en/latest/whatsnew-4.0.html](https://link.nylas .com/link/c6kbuz4icejw17oc3qqi6syrm/local-d891639d-1557/2?redirect=http%3A%2F% 2Fdocs.celeryproject.org%2Fen%2Flatest%2Fwhatsnew-4.0.html&r=cHl0aG9uLWFubm91b mNlLWxpc3RAcHl0aG9uLm9yZw==) Thank you for your support, \-- [ Ask Solem - github.com/ask | twitter.com/asksol ]