project/build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        jcenter()
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.1'
        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
        classpath "com.jfrog.bintray.gradle:gradle-bintray-plugin:1.0"
    }
}

allprojects {
    repositories {
        jcenter()
        maven { url "https://jitpack.io" }
        google()
    }
}