diff --git a/setup.py b/setup.py
index 74eb82d631..6a20c90a5f 100644
--- a/setup.py
+++ b/setup.py
@@ -28,7 +28,8 @@
 # http://pypi.python.org/pypi/setuptools
 
 EXTRAS = {
-    'adal': ['adal>=1.0.2']
+    'adal': ['adal>=1.0.2'],
+    'google-auth': ['google-auth>=1.0.0']  # Google Auth is now optional
 }
 REQUIRES = []
 with open('requirements.txt') as f: