build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        google()
        jcenter()
        // 1 add fabric plugin repo
        maven { url 'https://maven.fabric.io/public' }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        // 2 add fabric plugin dependency
        classpath 'io.fabric.tools:gradle:1.25.1'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

// update gradle wrapper with ./gradlew wrapper --gradle-version 2.13