diff --git a/google_auth_oauthlib/flow.py b/google_auth_oauthlib/flow.py
index 73d4804..a3785e9 100644
--- a/google_auth_oauthlib/flow.py
+++ b/google_auth_oauthlib/flow.py
@@ -97,7 +97,7 @@ def __init__(
         client_config,
         redirect_uri=None,
         code_verifier=None,
-        autogenerate_code_verifier=False,
+        autogenerate_code_verifier=True,
     ):
         """
         Args: