diff --git a/iot/api-client/codelabs/requirements.txt b/iot/api-client/codelabs/requirements.txt
index 72e80f60393..9e94541b064 100644
--- a/iot/api-client/codelabs/requirements.txt
+++ b/iot/api-client/codelabs/requirements.txt
@@ -1,3 +1,3 @@
 cryptography==3.1.1
-paho-mqtt==1.5.0
+paho-mqtt==1.5.1
 pyjwt==1.7.1
diff --git a/iot/api-client/end_to_end_example/requirements.txt b/iot/api-client/end_to_end_example/requirements.txt
index 9cb2a7e6dfe..a84100f399f 100644
--- a/iot/api-client/end_to_end_example/requirements.txt
+++ b/iot/api-client/end_to_end_example/requirements.txt
@@ -4,4 +4,4 @@ google-auth-httplib2==0.0.4
 google-auth==1.21.2
 google-cloud-pubsub==1.7.0
 pyjwt==1.7.1
-paho-mqtt==1.5.0
+paho-mqtt==1.5.1
diff --git a/iot/api-client/gcs_file_to_device/requirements.txt b/iot/api-client/gcs_file_to_device/requirements.txt
index 5f18235d4c7..779ee214544 100644
--- a/iot/api-client/gcs_file_to_device/requirements.txt
+++ b/iot/api-client/gcs_file_to_device/requirements.txt
@@ -5,5 +5,5 @@ google-cloud-iot==1.0.0
 google-cloud-pubsub==1.7.0
 google-cloud-storage==1.31.0
 cryptography==3.1.1
-paho-mqtt==1.5.0
+paho-mqtt==1.5.1
 pyjwt==1.7.1
diff --git a/iot/api-client/mqtt_example/requirements.txt b/iot/api-client/mqtt_example/requirements.txt
index 36a640dd0f9..2aaadf4b579 100644
--- a/iot/api-client/mqtt_example/requirements.txt
+++ b/iot/api-client/mqtt_example/requirements.txt
@@ -6,4 +6,4 @@ google-cloud-pubsub==1.7.0
 google-cloud-iot==1.0.0
 grpc-google-iam-v1==0.12.3
 pyjwt==1.7.1
-paho-mqtt==1.5.0
+paho-mqtt==1.5.1