diff --git a/appengine/standard/firebase/firenotes/backend/requirements.txt b/appengine/standard/firebase/firenotes/backend/requirements.txt
index 58a75a4df238..9ef83e21dbb1 100644
--- a/appengine/standard/firebase/firenotes/backend/requirements.txt
+++ b/appengine/standard/firebase/firenotes/backend/requirements.txt
@@ -1,6 +1,6 @@
 Flask==1.1.2
 pyjwt==1.7.1
 flask-cors==3.0.8
-google-auth==1.20.1
+google-auth==1.21.0
 requests==2.24.0
 requests-toolbelt==0.9.1
diff --git a/appengine/standard/firebase/firetactoe/requirements.txt b/appengine/standard/firebase/firetactoe/requirements.txt
index b6d230d5a398..ef387b1973c7 100644
--- a/appengine/standard/firebase/firetactoe/requirements.txt
+++ b/appengine/standard/firebase/firetactoe/requirements.txt
@@ -1,5 +1,5 @@
 flask==1.1.2
 requests==2.24.0
 requests_toolbelt==0.9.1
-google-auth==1.20.1
+google-auth==1.21.0
 functools32==3.2.3.post2; python_version < "3"
diff --git a/appengine/standard/migration/incoming/requirements.txt b/appengine/standard/migration/incoming/requirements.txt
index e232774cdec3..c47faba53366 100644
--- a/appengine/standard/migration/incoming/requirements.txt
+++ b/appengine/standard/migration/incoming/requirements.txt
@@ -1,2 +1,2 @@
-google-auth==1.20.1
+google-auth==1.21.0
 requests==2.24.0
\ No newline at end of file
diff --git a/appengine/standard/storage/api-client/requirements.txt b/appengine/standard/storage/api-client/requirements.txt
index 6e149081c31a..e25b0a8b96b2 100644
--- a/appengine/standard/storage/api-client/requirements.txt
+++ b/appengine/standard/storage/api-client/requirements.txt
@@ -1,3 +1,3 @@
 google-api-python-client==1.10.1
-google-auth==1.20.1
+google-auth==1.21.0
 google-auth-httplib2==0.0.4
diff --git a/appengine/standard_python3/building-an-app/building-an-app-3/requirements.txt b/appengine/standard_python3/building-an-app/building-an-app-3/requirements.txt
index 2fefd63fa0ba..b0cfe3d1f527 100644
--- a/appengine/standard_python3/building-an-app/building-an-app-3/requirements.txt
+++ b/appengine/standard_python3/building-an-app/building-an-app-3/requirements.txt
@@ -1,4 +1,4 @@
 Flask==1.1.2
 google-cloud-datastore==1.15.0
-google-auth==1.20.1
+google-auth==1.21.0
 requests==2.24.0
diff --git a/appengine/standard_python3/building-an-app/building-an-app-4/requirements.txt b/appengine/standard_python3/building-an-app/building-an-app-4/requirements.txt
index 2fefd63fa0ba..b0cfe3d1f527 100644
--- a/appengine/standard_python3/building-an-app/building-an-app-4/requirements.txt
+++ b/appengine/standard_python3/building-an-app/building-an-app-4/requirements.txt
@@ -1,4 +1,4 @@
 Flask==1.1.2
 google-cloud-datastore==1.15.0
-google-auth==1.20.1
+google-auth==1.21.0
 requests==2.24.0
diff --git a/appengine/standard_python3/migration/urlfetch/requirements.txt b/appengine/standard_python3/migration/urlfetch/requirements.txt
index cedcb1c53999..d325bbd5e6ed 100644
--- a/appengine/standard_python3/migration/urlfetch/requirements.txt
+++ b/appengine/standard_python3/migration/urlfetch/requirements.txt
@@ -1,3 +1,3 @@
 requests==2.24.0
 flask==1.1.2
-google-auth==1.20.1
\ No newline at end of file
+google-auth==1.21.0
\ No newline at end of file
diff --git a/appengine/standard_python3/pubsub/requirements.txt b/appengine/standard_python3/pubsub/requirements.txt
index f1b557c2fb67..24f7ca3f5bab 100644
--- a/appengine/standard_python3/pubsub/requirements.txt
+++ b/appengine/standard_python3/pubsub/requirements.txt
@@ -1,4 +1,4 @@
 Flask==1.1.2
 google-api-python-client==1.10.1
-google-auth==1.20.1
+google-auth==1.21.0
 google-cloud-pubsub==1.7.0
diff --git a/auth/api-client/requirements.txt b/auth/api-client/requirements.txt
index bf642e1fa22a..1b4f0307f94e 100644
--- a/auth/api-client/requirements.txt
+++ b/auth/api-client/requirements.txt
@@ -1,3 +1,3 @@
 google-api-python-client==1.10.1
 google-auth-httplib2==0.0.4
-google-auth==1.20.1
+google-auth==1.21.0
diff --git a/auth/end-user/web/requirements.txt b/auth/end-user/web/requirements.txt
index 16c41e5342fa..5642cc27f792 100644
--- a/auth/end-user/web/requirements.txt
+++ b/auth/end-user/web/requirements.txt
@@ -1,4 +1,4 @@
-google-auth==1.20.1
+google-auth==1.21.0
 google-auth-oauthlib==0.4.1
 google-auth-httplib2==0.0.4
 google-api-python-client==1.10.1
diff --git a/bigquery_storage/to_dataframe/requirements.txt b/bigquery_storage/to_dataframe/requirements.txt
index 6440b10de8f1..b5ac61772728 100644
--- a/bigquery_storage/to_dataframe/requirements.txt
+++ b/bigquery_storage/to_dataframe/requirements.txt
@@ -1,4 +1,4 @@
-google-auth==1.20.1
+google-auth==1.21.0
 google-cloud-bigquery-storage==1.0.0
 google-cloud-bigquery==1.25.0
 pyarrow==1.0.1
diff --git a/composer/functions/requirements.txt b/composer/functions/requirements.txt
index 5f4652ffbd08..8b3515c50ca7 100644
--- a/composer/functions/requirements.txt
+++ b/composer/functions/requirements.txt
@@ -1,2 +1,2 @@
 requests_toolbelt==0.9.1
-google-auth==1.20.1
+google-auth==1.21.0
diff --git a/composer/rest/requirements.txt b/composer/rest/requirements.txt
index 722c945c0209..d161a1f71c85 100644
--- a/composer/rest/requirements.txt
+++ b/composer/rest/requirements.txt
@@ -1,3 +1,3 @@
-google-auth==1.20.1
+google-auth==1.21.0
 requests==2.24.0
 six==1.15.0
diff --git a/compute/api/requirements.txt b/compute/api/requirements.txt
index 6e149081c31a..e25b0a8b96b2 100644
--- a/compute/api/requirements.txt
+++ b/compute/api/requirements.txt
@@ -1,3 +1,3 @@
 google-api-python-client==1.10.1
-google-auth==1.20.1
+google-auth==1.21.0
 google-auth-httplib2==0.0.4
diff --git a/compute/auth/requirements.txt b/compute/auth/requirements.txt
index 93e2a239b3ba..89679e840319 100644
--- a/compute/auth/requirements.txt
+++ b/compute/auth/requirements.txt
@@ -1,4 +1,4 @@
 requests==2.24.0
 google-api-python-client==1.10.1
-google-auth==1.20.1
+google-auth==1.21.0
 google-auth-httplib2==0.0.4
diff --git a/compute/encryption/requirements.txt b/compute/encryption/requirements.txt
index 46ede6b8b7cb..7d82a68abf0b 100644
--- a/compute/encryption/requirements.txt
+++ b/compute/encryption/requirements.txt
@@ -1,5 +1,5 @@
 cryptography==3.0
 requests==2.24.0
 google-api-python-client==1.10.1
-google-auth==1.20.1
+google-auth==1.21.0
 google-auth-httplib2==0.0.4
diff --git a/compute/oslogin/requirements.txt b/compute/oslogin/requirements.txt
index 6e0481c0a5a1..ddbc8e1bd6e0 100644
--- a/compute/oslogin/requirements.txt
+++ b/compute/oslogin/requirements.txt
@@ -1,4 +1,4 @@
 google-api-python-client==1.10.1
-google-auth==1.20.1
+google-auth==1.21.0
 google-auth-httplib2==0.0.4
 requests==2.24.0
diff --git a/endpoints/bookstore-grpc-transcoding/requirements.txt b/endpoints/bookstore-grpc-transcoding/requirements.txt
index 6cecc2a72c6a..ed0ef541e1fa 100644
--- a/endpoints/bookstore-grpc-transcoding/requirements.txt
+++ b/endpoints/bookstore-grpc-transcoding/requirements.txt
@@ -1,4 +1,4 @@
 grpcio==1.31.0
 grpcio-tools==1.31.0
-google-auth==1.20.1
+google-auth==1.21.0
 six==1.15.0
diff --git a/endpoints/bookstore-grpc/requirements.txt b/endpoints/bookstore-grpc/requirements.txt
index 6cecc2a72c6a..ed0ef541e1fa 100644
--- a/endpoints/bookstore-grpc/requirements.txt
+++ b/endpoints/bookstore-grpc/requirements.txt
@@ -1,4 +1,4 @@
 grpcio==1.31.0
 grpcio-tools==1.31.0
-google-auth==1.20.1
+google-auth==1.21.0
 six==1.15.0
diff --git a/endpoints/getting-started/clients/service_to_service_non_default/requirements.txt b/endpoints/getting-started/clients/service_to_service_non_default/requirements.txt
index 6e149081c31a..e25b0a8b96b2 100644
--- a/endpoints/getting-started/clients/service_to_service_non_default/requirements.txt
+++ b/endpoints/getting-started/clients/service_to_service_non_default/requirements.txt
@@ -1,3 +1,3 @@
 google-api-python-client==1.10.1
-google-auth==1.20.1
+google-auth==1.21.0
 google-auth-httplib2==0.0.4
diff --git a/endpoints/getting-started/requirements.txt b/endpoints/getting-started/requirements.txt
index 1542fe8520da..8de3ab75a2f2 100644
--- a/endpoints/getting-started/requirements.txt
+++ b/endpoints/getting-started/requirements.txt
@@ -4,5 +4,5 @@ gunicorn==20.0.4
 six==1.15.0
 pyyaml==5.3.1
 requests==2.24.0
-google-auth==1.20.1
+google-auth==1.21.0
 google-auth-oauthlib==0.4.1
diff --git a/healthcare/api-client/datasets/requirements.txt b/healthcare/api-client/datasets/requirements.txt
index 00f12a86ca55..80abcc5fd6a6 100644
--- a/healthcare/api-client/datasets/requirements.txt
+++ b/healthcare/api-client/datasets/requirements.txt
@@ -1,4 +1,4 @@
 google-api-python-client==1.10.1
 google-auth-httplib2==0.0.4
-google-auth==1.20.1
+google-auth==1.21.0
 google-cloud==0.34.0
diff --git a/healthcare/api-client/dicom/requirements.txt b/healthcare/api-client/dicom/requirements.txt
index 751865695a07..c8f60f31844e 100644
--- a/healthcare/api-client/dicom/requirements.txt
+++ b/healthcare/api-client/dicom/requirements.txt
@@ -1,5 +1,5 @@
 google-api-python-client==1.10.1
 google-auth-httplib2==0.0.4
-google-auth==1.20.1
+google-auth==1.21.0
 google-cloud-pubsub==1.7.0
 requests==2.24.0
diff --git a/healthcare/api-client/fhir/requirements.txt b/healthcare/api-client/fhir/requirements.txt
index b481a768e48d..ae4b11660b24 100644
--- a/healthcare/api-client/fhir/requirements.txt
+++ b/healthcare/api-client/fhir/requirements.txt
@@ -1,6 +1,6 @@
 google-api-python-client==1.10.1
 google-auth-httplib2==0.0.4
-google-auth==1.20.1
+google-auth==1.21.0
 google-cloud==0.34.0
 google-cloud-storage==1.31.0
 requests==2.24.0
diff --git a/healthcare/api-client/hl7v2/requirements.txt b/healthcare/api-client/hl7v2/requirements.txt
index 00f12a86ca55..80abcc5fd6a6 100644
--- a/healthcare/api-client/hl7v2/requirements.txt
+++ b/healthcare/api-client/hl7v2/requirements.txt
@@ -1,4 +1,4 @@
 google-api-python-client==1.10.1
 google-auth-httplib2==0.0.4
-google-auth==1.20.1
+google-auth==1.21.0
 google-cloud==0.34.0
diff --git a/healthcare/api-client/v1/datasets/requirements.txt b/healthcare/api-client/v1/datasets/requirements.txt
index 00f12a86ca55..80abcc5fd6a6 100644
--- a/healthcare/api-client/v1/datasets/requirements.txt
+++ b/healthcare/api-client/v1/datasets/requirements.txt
@@ -1,4 +1,4 @@
 google-api-python-client==1.10.1
 google-auth-httplib2==0.0.4
-google-auth==1.20.1
+google-auth==1.21.0
 google-cloud==0.34.0
diff --git a/healthcare/api-client/v1/dicom/requirements.txt b/healthcare/api-client/v1/dicom/requirements.txt
index 751865695a07..c8f60f31844e 100644
--- a/healthcare/api-client/v1/dicom/requirements.txt
+++ b/healthcare/api-client/v1/dicom/requirements.txt
@@ -1,5 +1,5 @@
 google-api-python-client==1.10.1
 google-auth-httplib2==0.0.4
-google-auth==1.20.1
+google-auth==1.21.0
 google-cloud-pubsub==1.7.0
 requests==2.24.0
diff --git a/healthcare/api-client/v1/fhir/requirements.txt b/healthcare/api-client/v1/fhir/requirements.txt
index b6479df7be0f..9f82e691907d 100644
--- a/healthcare/api-client/v1/fhir/requirements.txt
+++ b/healthcare/api-client/v1/fhir/requirements.txt
@@ -1,5 +1,5 @@
 google-api-python-client==1.10.1
 google-auth-httplib2==0.0.4
-google-auth==1.20.1
+google-auth==1.21.0
 google-cloud==0.34.0
 google-cloud-storage==1.31.0
diff --git a/healthcare/api-client/v1/hl7v2/requirements.txt b/healthcare/api-client/v1/hl7v2/requirements.txt
index 00f12a86ca55..80abcc5fd6a6 100644
--- a/healthcare/api-client/v1/hl7v2/requirements.txt
+++ b/healthcare/api-client/v1/hl7v2/requirements.txt
@@ -1,4 +1,4 @@
 google-api-python-client==1.10.1
 google-auth-httplib2==0.0.4
-google-auth==1.20.1
+google-auth==1.21.0
 google-cloud==0.34.0
diff --git a/iam/api-client/requirements.txt b/iam/api-client/requirements.txt
index 6e149081c31a..e25b0a8b96b2 100644
--- a/iam/api-client/requirements.txt
+++ b/iam/api-client/requirements.txt
@@ -1,3 +1,3 @@
 google-api-python-client==1.10.1
-google-auth==1.20.1
+google-auth==1.21.0
 google-auth-httplib2==0.0.4
diff --git a/iap/requirements.txt b/iap/requirements.txt
index 3c24afd9dccd..9f57343f2d31 100644
--- a/iap/requirements.txt
+++ b/iap/requirements.txt
@@ -1,6 +1,6 @@
 cryptography==3.0
 flask==1.1.2
-google-auth==1.20.1
+google-auth==1.21.0
 gunicorn==20.0.4
 requests==2.24.0
 requests_toolbelt==0.9.1
diff --git a/iot/api-client/end_to_end_example/requirements.txt b/iot/api-client/end_to_end_example/requirements.txt
index 5e9de8670cb3..e8946841a5a5 100644
--- a/iot/api-client/end_to_end_example/requirements.txt
+++ b/iot/api-client/end_to_end_example/requirements.txt
@@ -1,7 +1,7 @@
 cryptography==3.0
 google-api-python-client==1.10.1
 google-auth-httplib2==0.0.4
-google-auth==1.20.1
+google-auth==1.21.0
 google-cloud-pubsub==1.7.0
 pyjwt==1.7.1
 paho-mqtt==1.5.0
diff --git a/iot/api-client/gcs_file_to_device/requirements.txt b/iot/api-client/gcs_file_to_device/requirements.txt
index 5b0f17539e23..1717523fea80 100644
--- a/iot/api-client/gcs_file_to_device/requirements.txt
+++ b/iot/api-client/gcs_file_to_device/requirements.txt
@@ -1,5 +1,5 @@
 google-api-python-client==1.10.1
-google-auth==1.20.1
+google-auth==1.21.0
 google-auth-httplib2==0.0.4
 google-cloud-iot==1.0.0
 google-cloud-pubsub==1.7.0
diff --git a/iot/api-client/http_example/requirements.txt b/iot/api-client/http_example/requirements.txt
index e1e82de8ae29..d733db586980 100644
--- a/iot/api-client/http_example/requirements.txt
+++ b/iot/api-client/http_example/requirements.txt
@@ -1,7 +1,7 @@
 cryptography==3.0
 google-api-python-client==1.10.1
 google-auth-httplib2==0.0.4
-google-auth==1.20.1
+google-auth==1.21.0
 google-cloud-iot==1.0.0
 google-cloud-pubsub==1.7.0
 pyjwt==1.7.1
diff --git a/iot/api-client/manager/requirements.txt b/iot/api-client/manager/requirements.txt
index 9c0cb98fce78..28de786afd95 100644
--- a/iot/api-client/manager/requirements.txt
+++ b/iot/api-client/manager/requirements.txt
@@ -2,7 +2,7 @@ cryptography==3.0
 flaky==3.7.0
 google-api-python-client==1.10.1
 google-auth-httplib2==0.0.4
-google-auth==1.20.1
+google-auth==1.21.0
 google-cloud-iot==1.0.0
 google-cloud-pubsub==1.7.0
 paho-mqtt==1.5.0
diff --git a/iot/api-client/mqtt_example/requirements.txt b/iot/api-client/mqtt_example/requirements.txt
index e42241b9d55c..1a9b197f27fb 100644
--- a/iot/api-client/mqtt_example/requirements.txt
+++ b/iot/api-client/mqtt_example/requirements.txt
@@ -1,7 +1,7 @@
 cryptography==3.0
 google-api-python-client==1.10.1
 google-auth-httplib2==0.0.4
-google-auth==1.20.1
+google-auth==1.21.0
 google-cloud-pubsub==1.7.0
 google-cloud-iot==1.0.0
 grpc-google-iam-v1==0.12.3
diff --git a/jobs/v3/api_client/requirements.txt b/jobs/v3/api_client/requirements.txt
index 6e149081c31a..e25b0a8b96b2 100755
--- a/jobs/v3/api_client/requirements.txt
+++ b/jobs/v3/api_client/requirements.txt
@@ -1,3 +1,3 @@
 google-api-python-client==1.10.1
-google-auth==1.20.1
+google-auth==1.21.0
 google-auth-httplib2==0.0.4
diff --git a/kubernetes_engine/api-client/requirements.txt b/kubernetes_engine/api-client/requirements.txt
index 6e149081c31a..e25b0a8b96b2 100644
--- a/kubernetes_engine/api-client/requirements.txt
+++ b/kubernetes_engine/api-client/requirements.txt
@@ -1,3 +1,3 @@
 google-api-python-client==1.10.1
-google-auth==1.20.1
+google-auth==1.21.0
 google-auth-httplib2==0.0.4
diff --git a/language/api/requirements.txt b/language/api/requirements.txt
index 6e149081c31a..e25b0a8b96b2 100644
--- a/language/api/requirements.txt
+++ b/language/api/requirements.txt
@@ -1,3 +1,3 @@
 google-api-python-client==1.10.1
-google-auth==1.20.1
+google-auth==1.21.0
 google-auth-httplib2==0.0.4
diff --git a/ml_engine/online_prediction/requirements.txt b/ml_engine/online_prediction/requirements.txt
index 787b33350396..4692aed1d0ec 100644
--- a/ml_engine/online_prediction/requirements.txt
+++ b/ml_engine/online_prediction/requirements.txt
@@ -1,5 +1,5 @@
 tensorflow==2.0.1; python_version > "3.0"
 tensorflow==1.15.0; python_version < "3.0"
 google-api-python-client==1.10.1
-google-auth==1.20.1
+google-auth==1.21.0
 google-auth-httplib2==0.0.4
diff --git a/monitoring/api/v3/api-client/requirements.txt b/monitoring/api/v3/api-client/requirements.txt
index 6e149081c31a..e25b0a8b96b2 100644
--- a/monitoring/api/v3/api-client/requirements.txt
+++ b/monitoring/api/v3/api-client/requirements.txt
@@ -1,3 +1,3 @@
 google-api-python-client==1.10.1
-google-auth==1.20.1
+google-auth==1.21.0
 google-auth-httplib2==0.0.4
diff --git a/run/markdown-preview/editor/requirements.txt b/run/markdown-preview/editor/requirements.txt
index 864a0f31efd3..d6e5b9a4c87a 100644
--- a/run/markdown-preview/editor/requirements.txt
+++ b/run/markdown-preview/editor/requirements.txt
@@ -1,4 +1,4 @@
 Flask==1.1.1
 gunicorn==20.0.4
-google-auth==1.20.1
+google-auth==1.21.0
 requests==2.24.0
\ No newline at end of file
diff --git a/run/markdown-preview/requirements-test.txt b/run/markdown-preview/requirements-test.txt
index 7e84ab1fcd99..833d6eea114e 100644
--- a/run/markdown-preview/requirements-test.txt
+++ b/run/markdown-preview/requirements-test.txt
@@ -1,3 +1,3 @@
 pytest==6.0.1
-google-auth==1.20.1
+google-auth==1.21.0
 google-api-python-client==1.10.1
diff --git a/storage/api/requirements.txt b/storage/api/requirements.txt
index 6e149081c31a..e25b0a8b96b2 100644
--- a/storage/api/requirements.txt
+++ b/storage/api/requirements.txt
@@ -1,3 +1,3 @@
 google-api-python-client==1.10.1
-google-auth==1.20.1
+google-auth==1.21.0
 google-auth-httplib2==0.0.4
diff --git a/storage/signed_urls/requirements.txt b/storage/signed_urls/requirements.txt
index 0f997d32ac25..0a0666b11358 100644
--- a/storage/signed_urls/requirements.txt
+++ b/storage/signed_urls/requirements.txt
@@ -1,3 +1,3 @@
 google-cloud-storage==1.31.0
-google-auth==1.20.1
+google-auth==1.21.0
 six==1.15.0
diff --git a/storage/transfer_service/requirements.txt b/storage/transfer_service/requirements.txt
index 6e149081c31a..e25b0a8b96b2 100644
--- a/storage/transfer_service/requirements.txt
+++ b/storage/transfer_service/requirements.txt
@@ -1,3 +1,3 @@
 google-api-python-client==1.10.1
-google-auth==1.20.1
+google-auth==1.21.0
 google-auth-httplib2==0.0.4