diff --git a/src/gam.py b/src/gam.py
index e4607955..cc6d9258 100755
--- a/src/gam.py
+++ b/src/gam.py
@@ -7798,7 +7798,7 @@ def _run_oauth_flow(client_id, client_secret, scopes, access_type, login_hint=No
       }
     }
 
-  flow = ShortURLFlow.from_client_config(client_config, scopes)
+  flow = ShortURLFlow.from_client_config(client_config, scopes, autogenerate_code_verifier=True)
   kwargs = {'access_type': access_type}
   if login_hint:
     kwargs['login_hint'] = login_hint
diff --git a/src/requirements.txt b/src/requirements.txt
index f0a64365..d3e3a70f 100644
--- a/src/requirements.txt
+++ b/src/requirements.txt
@@ -4,6 +4,6 @@ filelock
 google-api-python-client>=1.7.10
 google-auth
 google-auth-httplib2
-google-auth-oauthlib==0.4.0
+google-auth-oauthlib>=0.4.1
 httplib2>=0.13.0
 passlib