Upgrade setup tools to the latest version
diff --git a/setup.py b/setup.py
index b035cdc..6423503 100644
--- a/setup.py
+++ b/setup.py
@@ -30,7 +30,7 @@
 REQUIRED_PACKAGES = [
     'httplib2>=0.8',
     'oauth2client>=1.5.2,<4.0.0dev',
-    'setuptools==18.5',
+    'setuptools>=35.0.1',
     'six>=1.9.0',
     ]