Updated - Pull 243 [Update deprecated Heroku command](https://github.com/sendgrid/sendgrid-python/pull/243) - Big thanks to [Roberto Ortega](https://github.com/berto) for the pull request!
3.6.2
Fixed - Pull 240 [Add six to requirements.txt](https://github.com/sendgrid/sendgrid-python/pull/246) - Big thanks to [Wataru Sato](https://github.com/awwa) for the pull request!
3.6.1
Fixed - Pull 246 [Typo 'user' for 'usr'](https://github.com/sendgrid/sendgrid-python/pull/246) - Big thanks to [Mike Ralphson](https://github.com/MikeRalphson) for the pull request!
3.6.0
Added - Pull 234 [Substitutions allow non-strings for values](https://github.com/sendgrid/sendgrid-python/pull/234) - Big thanks to [ittus](https://github.com/ittus) for the pull request!
3.5.0
Added - Pull 233: [Allow dict to be passed to add_headers](https://github.com/sendgrid/sendgrid-python/pull/233) - Big thanks to [Navin Pai](https://github.com/navinpai) for the pull request!
3.4.0
Added - Pull 215 - Support larger files. Note that there is a 20MB maximum.