I installed the Kotlin plugin into my app (v. v1.1.1-release-Studio2.2-1) and then selected "Configure Kotlin in Project" I selected compiler and runtime version
Starting with Kotlin 1.1.2, the dependencies with group org.jetbrains.kotlin are by default resolved with the version taken from the applied plugin. You can provide the version manually using the full dependency notation like:
compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
If you're targeting JDK 7 or JDK 8, you can use extended versions of the Kotlin standard library which contain additional extension functions for APIs added in new JDK versions. Instead of kotlin-stdlib, use one of the following dependencies:
compile "org.jetbrains.kotlin:kotlin-stdlib-jdk7"
compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8"