Exclude kotlin from that dependency like here (support lib): https://github.com/mg6maciej/fluffy-octo-rotary-phone/blob/develop/app/build.gradle#L79 Or force version of Kotlin: https://github.com/mg6maciej/fluffy-octo-rotary-phone/blob/develop/build.gradle#L27-L34

did you actually try it with 1.1.1 ?

I had some other problem with 1.1.1, so I have to say I didn't.