title: Facebook SDK upgrade and android.support v7:25
body: <p>So I recently tried running my app which had been working fine until facebook updated their sdk which caused problems with different variations of android.support v7:25.</p>
  
  <p>The dependency that caused the issue was 'com.facebook.android:facebook-android-sdk:4+'.  To fix the issue i just specified a version that I wanted.</p>
  
  <p>My question is, will this cause my apps that have already been published with the 4+ dependency to crash and should I immediately update my app with the specific version? </p>