diff --git a/iot/api-client/mqtt_example/requirements.txt b/iot/api-client/mqtt_example/requirements.txt
index 98ff1ff2b9e..4d8287cb90f 100644
--- a/iot/api-client/mqtt_example/requirements.txt
+++ b/iot/api-client/mqtt_example/requirements.txt
@@ -2,6 +2,6 @@ google-api-python-client==1.7.4
 google-auth-httplib2==0.0.3
 google-auth==1.5.1
 google-cloud-pubsub==0.37.2
-cryptography==2.3.1
+cryptography==39.0.1
 pyjwt==1.6.4
 paho-mqtt==1.3.1