diff --git a/iam/api-client/requirements.txt b/iam/api-client/requirements.txt
index 52ccdec8694e..421ee1f3d9c8 100644
--- a/iam/api-client/requirements.txt
+++ b/iam/api-client/requirements.txt
@@ -1,3 +1,3 @@
-google-api-python-client==1.8.2
+google-api-python-client==1.8.3
 google-auth==1.15.0
 google-auth-httplib2==0.0.3
diff --git a/iot/api-client/end_to_end_example/requirements.txt b/iot/api-client/end_to_end_example/requirements.txt
index fea704e32a46..53ea9bafda1a 100644
--- a/iot/api-client/end_to_end_example/requirements.txt
+++ b/iot/api-client/end_to_end_example/requirements.txt
@@ -1,5 +1,5 @@
 cryptography==2.9.2
-google-api-python-client==1.8.2
+google-api-python-client==1.8.3
 google-auth-httplib2==0.0.3
 google-auth==1.15.0
 google-cloud-pubsub==1.4.3
diff --git a/iot/api-client/gcs_file_to_device/requirements.txt b/iot/api-client/gcs_file_to_device/requirements.txt
index 510e8e735ba1..94aebc95708d 100644
--- a/iot/api-client/gcs_file_to_device/requirements.txt
+++ b/iot/api-client/gcs_file_to_device/requirements.txt
@@ -1,4 +1,4 @@
-google-api-python-client==1.8.2
+google-api-python-client==1.8.3
 google-auth==1.15.0
 google-auth-httplib2==0.0.3
 google-cloud-iot==1.0.0
diff --git a/iot/api-client/http_example/requirements.txt b/iot/api-client/http_example/requirements.txt
index f520e9a6b896..b6f0157fed2a 100644
--- a/iot/api-client/http_example/requirements.txt
+++ b/iot/api-client/http_example/requirements.txt
@@ -1,5 +1,5 @@
 cryptography==2.9.2
-google-api-python-client==1.8.2
+google-api-python-client==1.8.3
 google-auth-httplib2==0.0.3
 google-auth==1.15.0
 google-cloud-iot==1.0.0
diff --git a/iot/api-client/manager/requirements.txt b/iot/api-client/manager/requirements.txt
index 978c59e711fc..4b67568413f5 100644
--- a/iot/api-client/manager/requirements.txt
+++ b/iot/api-client/manager/requirements.txt
@@ -1,6 +1,6 @@
 cryptography==2.9.2
 flaky==3.6.1
-google-api-python-client==1.8.2
+google-api-python-client==1.8.3
 google-auth-httplib2==0.0.3
 google-auth==1.15.0
 google-cloud-iot==1.0.0
diff --git a/iot/api-client/mqtt_example/requirements.txt b/iot/api-client/mqtt_example/requirements.txt
index dee12c3b8d5f..c4f2b16ebe5e 100644
--- a/iot/api-client/mqtt_example/requirements.txt
+++ b/iot/api-client/mqtt_example/requirements.txt
@@ -1,5 +1,5 @@
 cryptography==2.9.2
-google-api-python-client==1.8.2
+google-api-python-client==1.8.3
 google-auth-httplib2==0.0.3
 google-auth==1.15.0
 google-cloud-pubsub==1.4.3