Google play services two version conflict

Hi, I need help. I'm using Stan's Android Native Plugin which has Google Play SDK version 11.0.2. Everything with this is OK. But, I need plugin for access to Firebase (Auth and Database(real-time) ). I downloaded official Firebase SDK but there is problem with aar files.

Android native plugin (v11.0.2):

• play-services-base.aar

• play-services-basement.aar

• play-services-tasks.aar
  
  Firebase (v11.4.2):

• play-services-base-11.4.2.aar

• play-services-basement-11.4.2.aar

• play-services-tasks-11.4.2.aar
  
  

When I remove files from one plugin, build is success with out any DEX error, but the game immediately crash during starting up. I don't have any idea how can I solve this :(