Firebase Version: 8.1.0 is lower than the minimum version (9.0.0) required for google-services plugin

I need to add push notification to my app in android but when I add

apply plugin: 'com.google.gms.google-services'

I got this error

Error:(75, 0) Version: 8.1.0 is lower than the minimum version (9.0.0) required for google-services plugin.

This is my bulld.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.0"

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 19
        versionCode 25
        versionName "2.4"
        multiDexEnabled true

    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

repositories {
    maven { url "https://jitpack.io" }
}


dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    }) 
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.android.support:multidex:1.0.1'
    compile 'com.github.PhilJay:MPAndroidChart:v2.1.3'
    compile 'com.github.lzyzsd:circleprogress:1.1.0@aar'
    compile 'com.commit451:PhotoView:1.2.4'
    compile 'com.google.android.gms:play-services:8.1.0'
    compile 'com.nineoldandroids:library:2.4.0'
    compile 'com.daimajia.slider:library:1.1.5@aar'
    compile 'com.twotoasters.jazzylistview:library:1.2.1'
    compile 'com.twotoasters.jazzylistview:library-recyclerview:1.2.1'
    compile 'se.emilsjolander:stickylistheaders:2.7.0'
    compile 'com.squareup.retrofit2:retrofit:2.0.2'
    compile 'com.squareup.retrofit2:converter-gson:2.0.2'
    compile 'pl.droidsonroids.gif:android-gif-drawable:1.1.0'
    compile 'me.nlmartian.silkcal:library:0.1.1'
    compile 'com.davemorrissey.labs:subsampling-scale-image-view:3.6.0'
    compile 'com.android.support:recyclerview-v7:21.1.0'
    compile 'com.pushbots:pushbots-lib:2.0.13@aar'
    compile 'com.android.support:support-v4:21.1.0'
    compile 'com.makeramen:roundedimageview:2.3.0'
    compile 'jp.wasabeef:blurry:2.1.1'
    compile 'com.google.firebase:firebase-messaging:10.0.1'
    testCompile 'junit:junit:4.12'
}
apply plugin: 'com.google.gms.google-services'

-

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.2.3'
        classpath 'com.google.gms:google-services:3.0.0'
    }
}

I tried to solve this with many solution but I can't , so if anyone can help me please answer!