# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2017-09-20 22:36:17 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/910633744050012160) RT @johnsundell: Want to use Swift 4 but have Swift 3 dependencies? Usually not a problem, but when using CocoaPods you may need to turn on…