diff --git a/core/google/cloud/credentials.py b/core/google/cloud/credentials.py
index 52cba9b22fcc..6a1bf512f7a9 100644
--- a/core/google/cloud/credentials.py
+++ b/core/google/cloud/credentials.py
@@ -61,7 +61,8 @@ def _get_signed_query_params(credentials, expiration, string_to_sign):
     """
     if not isinstance(credentials, google.auth.credentials.Signing):
         auth_uri = ('http://google-cloud-python.readthedocs.io/en/latest/'
-                    'google-cloud-auth.html#setting-up-a-service-account')
+                    'core/auth.html?highlight=authentication#setting-up-'
+                    'a-service-account')
         raise AttributeError('you need a private key to sign credentials.'
                              'the credentials you are currently using %s '
                              'just contains a token. see %s for more '
diff --git a/storage/google/cloud/storage/bucket.py b/storage/google/cloud/storage/bucket.py
index 865a23840af4..895a6e38473f 100644
--- a/storage/google/cloud/storage/bucket.py
+++ b/storage/google/cloud/storage/bucket.py
@@ -1016,7 +1016,8 @@ def generate_upload_policy(
 
         if not isinstance(credentials, google.auth.credentials.Signing):
             auth_uri = ('http://google-cloud-python.readthedocs.io/en/latest/'
-                        'google-cloud-auth.html#setting-up-a-service-account')
+                        'core/auth.html?highlight=authentication#setting-up-'
+                        'a-service-account')
             raise AttributeError(
                 'you need a private key to sign credentials.'
                 'the credentials you are currently using %s '