Plugin with id 'androidx.navigation.safeargs' not found

[TaeTae]

When I try to add Safe Args (Android Navigation) to my app's as following

( using this guide : https://developer.android.com/topic/libraries/architecture/navigation/navigation-pass-data ) :

apply plugin: 'com.android.application'
apply plugin: 'androidx.navigation.safeargs'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'
apply plugin: 'com.google.gms.google-services'

android {...

I receive this error :

Plugin with id 'androidx.navigation.safeargs' not found.