Twitter is doubling the character limit to 280 however, only a few select accounts have access to the new limit. Until this new limit is rolled out to everyone, there is a relatively easy workaround. Follow the steps below and you will be on your way to longer tweets!
For this hack you need to use a Google Chrome browser and you also need to use TweetDeck to send out your tweets.
This Chrome extension is working as of 10/02/17.