diff --git a/appengine/flexible/pubsub/requirements.txt b/appengine/flexible/pubsub/requirements.txt
index 454c4814bb2..69777af95d9 100644
--- a/appengine/flexible/pubsub/requirements.txt
+++ b/appengine/flexible/pubsub/requirements.txt
@@ -1,3 +1,3 @@
 Flask==1.1.2
-google-cloud-pubsub==1.4.3
+google-cloud-pubsub==1.5.0
 gunicorn==20.0.4
diff --git a/appengine/standard_python3/pubsub/requirements.txt b/appengine/standard_python3/pubsub/requirements.txt
index 114632d3d4e..a6dbaa83f4d 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==1.8.3
 google-auth==1.15.0
-google-cloud-pubsub==1.4.2
+google-cloud-pubsub==1.5.0
diff --git a/appengine/standard_python37/pubsub/requirements.txt b/appengine/standard_python37/pubsub/requirements.txt
index 9950639db15..a6dbaa83f4d 100644
--- a/appengine/standard_python37/pubsub/requirements.txt
+++ b/appengine/standard_python37/pubsub/requirements.txt
@@ -1,4 +1,4 @@
 Flask==1.1.2
 google-api-python-client==1.8.3
 google-auth==1.15.0
-google-cloud-pubsub==1.4.3
+google-cloud-pubsub==1.5.0
diff --git a/asset/cloud-client/requirements.txt b/asset/cloud-client/requirements.txt
index 5ea25f2eab2..0ac54d81cf9 100644
--- a/asset/cloud-client/requirements.txt
+++ b/asset/cloud-client/requirements.txt
@@ -1,4 +1,4 @@
 google-cloud-storage==1.28.1
 google-cloud-asset==0.10.0
 google-cloud-resource-manager==0.30.2
-google-cloud-pubsub==1.4.3
+google-cloud-pubsub==1.5.0
diff --git a/container_registry/container_analysis/requirements.txt b/container_registry/container_analysis/requirements.txt
index 7e7518198bb..4fa09a775c6 100644
--- a/container_registry/container_analysis/requirements.txt
+++ b/container_registry/container_analysis/requirements.txt
@@ -1,4 +1,4 @@
-google-cloud-pubsub==1.4.3
+google-cloud-pubsub==1.5.0
 google-cloud-containeranalysis==0.3.1
 grafeas==0.4.0
 pytest==5.3.0; python_version > "3.0"
diff --git a/dlp/requirements.txt b/dlp/requirements.txt
index 68cf746cfd0..ca7f2c856df 100644
--- a/dlp/requirements.txt
+++ b/dlp/requirements.txt
@@ -1,5 +1,5 @@
 google-cloud-dlp==0.15.0
 google-cloud-storage==1.28.1
-google-cloud-pubsub==1.4.3
+google-cloud-pubsub==1.5.0
 google-cloud-datastore==1.12.0
 google-cloud-bigquery==1.24.0
diff --git a/functions/ocr/app/requirements.txt b/functions/ocr/app/requirements.txt
index 16bd67ad12a..2b32e7046a5 100644
--- a/functions/ocr/app/requirements.txt
+++ b/functions/ocr/app/requirements.txt
@@ -1,4 +1,4 @@
-google-cloud-pubsub==1.4.3
+google-cloud-pubsub==1.5.0
 google-cloud-storage==1.28.1
 google-cloud-translate==2.0.1
 google-cloud-vision==1.0.0
diff --git a/functions/pubsub/requirements.txt b/functions/pubsub/requirements.txt
index d9d8db069ea..98dab2bec2c 100644
--- a/functions/pubsub/requirements.txt
+++ b/functions/pubsub/requirements.txt
@@ -1 +1 @@
-google-cloud-pubsub==1.4.3
\ No newline at end of file
+google-cloud-pubsub==1.5.0
\ No newline at end of file
diff --git a/functions/tips/requirements.txt b/functions/tips/requirements.txt
index 98d89c11781..d4fdb42aed5 100644
--- a/functions/tips/requirements.txt
+++ b/functions/tips/requirements.txt
@@ -1,5 +1,5 @@
 google-cloud-error-reporting==0.34.0
-google-cloud-pubsub==1.4.3
+google-cloud-pubsub==1.5.0
 python-dateutil==2.8.1
 requests==2.23.0
 xmltodict==0.12.0
diff --git a/healthcare/api-client/dicom/requirements.txt b/healthcare/api-client/dicom/requirements.txt
index 06a91f07e6c..6240c4bb0eb 100644
--- a/healthcare/api-client/dicom/requirements.txt
+++ b/healthcare/api-client/dicom/requirements.txt
@@ -1,5 +1,5 @@
 google-api-python-client==1.8.3
 google-auth-httplib2==0.0.3
 google-auth==1.15.0
-google-cloud-pubsub==1.4.3
+google-cloud-pubsub==1.5.0
 requests==2.23.0
diff --git a/healthcare/api-client/v1/dicom/requirements.txt b/healthcare/api-client/v1/dicom/requirements.txt
index 06a91f07e6c..6240c4bb0eb 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==1.8.3
 google-auth-httplib2==0.0.3
 google-auth==1.15.0
-google-cloud-pubsub==1.4.3
+google-cloud-pubsub==1.5.0
 requests==2.23.0
diff --git a/iot/api-client/end_to_end_example/requirements.txt b/iot/api-client/end_to_end_example/requirements.txt
index 53ea9bafda1..2844fb3f5d9 100644
--- a/iot/api-client/end_to_end_example/requirements.txt
+++ b/iot/api-client/end_to_end_example/requirements.txt
@@ -2,6 +2,6 @@ cryptography==2.9.2
 google-api-python-client==1.8.3
 google-auth-httplib2==0.0.3
 google-auth==1.15.0
-google-cloud-pubsub==1.4.3
+google-cloud-pubsub==1.5.0
 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 94aebc95708..392d016945c 100644
--- a/iot/api-client/gcs_file_to_device/requirements.txt
+++ b/iot/api-client/gcs_file_to_device/requirements.txt
@@ -2,7 +2,7 @@ google-api-python-client==1.8.3
 google-auth==1.15.0
 google-auth-httplib2==0.0.3
 google-cloud-iot==1.0.0
-google-cloud-pubsub==1.4.3
+google-cloud-pubsub==1.5.0
 google-cloud-storage==1.28.1
 cryptography==2.9.2
 paho-mqtt==1.5.0
diff --git a/iot/api-client/http_example/requirements.txt b/iot/api-client/http_example/requirements.txt
index b6f0157fed2..69f3fd3074c 100644
--- a/iot/api-client/http_example/requirements.txt
+++ b/iot/api-client/http_example/requirements.txt
@@ -3,6 +3,6 @@ google-api-python-client==1.8.3
 google-auth-httplib2==0.0.3
 google-auth==1.15.0
 google-cloud-iot==1.0.0
-google-cloud-pubsub==1.4.3
+google-cloud-pubsub==1.5.0
 pyjwt==1.7.1
 requests==2.23.0
diff --git a/iot/api-client/manager/requirements.txt b/iot/api-client/manager/requirements.txt
index 4b67568413f..733341f614d 100644
--- a/iot/api-client/manager/requirements.txt
+++ b/iot/api-client/manager/requirements.txt
@@ -4,6 +4,6 @@ google-api-python-client==1.8.3
 google-auth-httplib2==0.0.3
 google-auth==1.15.0
 google-cloud-iot==1.0.0
-google-cloud-pubsub==1.4.3
+google-cloud-pubsub==1.5.0
 paho-mqtt==1.5.0
 pyjwt==1.7.1
diff --git a/iot/api-client/mqtt_example/requirements.txt b/iot/api-client/mqtt_example/requirements.txt
index c4f2b16ebe5..9b4e4b6b0be 100644
--- a/iot/api-client/mqtt_example/requirements.txt
+++ b/iot/api-client/mqtt_example/requirements.txt
@@ -2,7 +2,7 @@ cryptography==2.9.2
 google-api-python-client==1.8.3
 google-auth-httplib2==0.0.3
 google-auth==1.15.0
-google-cloud-pubsub==1.4.3
+google-cloud-pubsub==1.5.0
 google-cloud-iot==1.0.0
 grpc-google-iam-v1==0.12.3
 pyjwt==1.7.1
diff --git a/iot/api-client/scripts/requirements.txt b/iot/api-client/scripts/requirements.txt
index 110c3b79a33..9cc17af84c3 100644
--- a/iot/api-client/scripts/requirements.txt
+++ b/iot/api-client/scripts/requirements.txt
@@ -1 +1 @@
-google-cloud-pubsub==1.4.3
+google-cloud-pubsub==1.5.0
diff --git a/pubsub/cloud-client/requirements.txt b/pubsub/cloud-client/requirements.txt
index 110c3b79a33..9cc17af84c3 100644
--- a/pubsub/cloud-client/requirements.txt
+++ b/pubsub/cloud-client/requirements.txt
@@ -1 +1 @@
-google-cloud-pubsub==1.4.3
+google-cloud-pubsub==1.5.0
diff --git a/storage/cloud-client/requirements.txt b/storage/cloud-client/requirements.txt
index b2d1ae09c05..9f79b893aaf 100644
--- a/storage/cloud-client/requirements.txt
+++ b/storage/cloud-client/requirements.txt
@@ -1,2 +1,2 @@
-google-cloud-pubsub==1.4.3
+google-cloud-pubsub==1.5.0
 google-cloud-storage==1.28.1