Prefekt crashes with Kotlin 1.3

[rock3r]

When first accessing Prefekt:

java.lang.NoClassDefFoundError: Failed resolution of: Lkotlinx/coroutines/experimental/android/HandlerContextKt;
    at com.stylingandroid.prefekt.internal.PrefektOwner.<init>(PrefektOwner.kt:19)
    at com.stylingandroid.prefekt.FragmentActivityKt.prefektGeneric(FragmentActivity.kt:80)
    at com.stylingandroid.prefekt.FragmentActivityKt.prefektGeneric(FragmentActivity.kt:57)
    at com.stylingandroid.prefekt.FragmentActivityKt.prefekt(FragmentActivity.kt:54)
    at com.jetbrains.iogallery.debug.DebugPreferences.<init>(DebugPreferences.kt:18)

I am using Kotlin 1.3.21, and I don't have any explicit coroutine dependency.