unable to locate the play service dependency base version 9.4.0

[Todd Fabacher]

In 9.5 stable I have added the Android barcode widget. With that and a
button just to test it. But when I try and compile I get an error
message:

unable to locate the play service dependency base version 9.4.0

Am I missing something?  - Any help would be appreciated. I am under
the gun and I  need to get barcode working on Android.

--Todd