Update Readme.md (#6157)

README.md

@@ -15,7 +15,7 @@ Sequelize is a promise-based Node.js/io.js ORM for Postgres, MySQL, SQLite and M
 
 From 3.0.0 and up Sequelize will follow SEMVER. 3.0.0 contains important security fixes so we highly recommend that users upgrade.
 
-If you still use 1.7 please prefer to [Upgrading to 2.0](https://github.com/sequelize/sequelize/wiki/Upgrading-to-2.0) and the changelog between 2.0 and 3.0. 2.1 also has a breaking change.
+Starting from 4.0.0 Sequelize will only support Node v4 and above to use ES6 features. If you are still using older versions like 1.7 or 2.0, Please consider updating to latest v3.
 
 ## Features
 
@@ -33,11 +33,13 @@ If you still use 1.7 please prefer to [Upgrading to 2.0](https://github.com/sequ
 ## Resources
 - [Changelog](https://github.com/sequelize/sequelize/blob/master/changelog.md)
 - [Getting Started](http://docs.sequelizejs.com/en/latest/docs/getting-started/)
+- [Express Example](https://github.com/sequelize/express-example)
 - [Documentation](http://docs.sequelizejs.com/en/latest/)
 - [API Reference](http://docs.sequelizejs.com/en/latest/)
 - [Collaboration and pull requests](https://github.com/sequelize/sequelize/blob/master/CONTRIBUTING.md)
 - [Roadmap](https://github.com/sequelize/sequelize/issues/2869)
 - [Twitter](https://twitter.com/SequelizeJS): @SequelizeJS
+- [Slack](https://sequelize.slack.com)
 - [IRC](http://webchat.freenode.net?channels=sequelizejs): sequelizejs on Freenode
 - [Google Groups](https://groups.google.com/forum/#!forum/sequelize)
 - [Add-ons & Plugins](https://github.com/sequelize/sequelize/wiki/Add-ons-&-Plugins)