diff --git a/setup.py b/setup.py
index dc337ebb..621018fb 100644
--- a/setup.py
+++ b/setup.py
@@ -26,7 +26,8 @@
     description="Google Drive API made easy. Maintained fork of PyDrive.",
     long_description=open("README.rst").read(),
     install_requires=[
-        "google-api-python-client >= 1.7.12",
+        "google-api-python-client >= 1.12.1",
+        "six >= 1.13.0",
         "oauth2client >= 4.0.0",
         "PyYAML >= 3.0",
         "pyOpenSSL >= 19.1.0",