如何修复错误：找不到com.google.gms：google-services：3.0.0。？

我正在尝试在我的应用程序中添加Firebase addmob。

在build.gradle（Project）中，我有以下代码

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.google.gms: google-services: 3.0.0'
        classpath 'com.android.tools.build:gradle:2.1.3'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

在build.gradle（模块）

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "24.0.2"

    defaultConfig {
        applicationId "com.myname.examp.myapp"
        minSdkVersion 14
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.0.0'
    compile 'com.android.support:design:23.0.0'
    compile 'com.google.firebase: firebase-ads: 9.0.0'
}
apply plugin: 'com.google.gms.google-services'

我已经更新了Google Play服务和存储库的版本

当我仍然同步项目时，出现以下错误

Error:Could not find com.google.gms: google-services: 3.0.0.
Searched in the following locations:
    file:/C:/Program Files/Android/Android Studio2/gradle/m2repository/com/google/gms/ google-services/ 3.0.0/ google-services- 3.0.0.pom
    file:/C:/Program Files/Android/Android Studio2/gradle/m2repository/com/google/gms/ google-services/ 3.0.0/ google-services- 3.0.0.jar
    https://jcenter.bintray.com/com/google/gms/ google-services/ 3.0.0/ google-services- 3.0.0.pom
    https://jcenter.bintray.com/com/google/gms/ google-services/ 3.0.0/ google-services- 3.0.0.jar
Required by:
    :MyApplication:unspecified

可以帮我解决这个错误吗