diff --git a/compute/encryption/requirements.txt b/compute/encryption/requirements.txt
index 4f6e647551..163bcb1134 100644
--- a/compute/encryption/requirements.txt
+++ b/compute/encryption/requirements.txt
@@ -1,4 +1,4 @@
-cryptography==3.0
+cryptography==3.1
 requests==2.24.0
 google-api-python-client==1.11.0
 google-auth==1.21.0
diff --git a/iap/requirements.txt b/iap/requirements.txt
index 9f57343f2d..406ef5457a 100644
--- a/iap/requirements.txt
+++ b/iap/requirements.txt
@@ -1,4 +1,4 @@
-cryptography==3.0
+cryptography==3.1
 flask==1.1.2
 google-auth==1.21.0
 gunicorn==20.0.4
diff --git a/iot/api-client/codelabs/requirements.txt b/iot/api-client/codelabs/requirements.txt
index 0c135837ac..e14f5a60db 100644
--- a/iot/api-client/codelabs/requirements.txt
+++ b/iot/api-client/codelabs/requirements.txt
@@ -1,3 +1,3 @@
-cryptography==3.0
+cryptography==3.1
 paho-mqtt==1.5.0
 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 b87026e2d8..0348ebcbb1 100644
--- a/iot/api-client/end_to_end_example/requirements.txt
+++ b/iot/api-client/end_to_end_example/requirements.txt
@@ -1,4 +1,4 @@
-cryptography==3.0
+cryptography==3.1
 google-api-python-client==1.11.0
 google-auth-httplib2==0.0.4
 google-auth==1.21.0
diff --git a/iot/api-client/gcs_file_to_device/requirements.txt b/iot/api-client/gcs_file_to_device/requirements.txt
index ba58b1b972..02fbcf36d2 100644
--- a/iot/api-client/gcs_file_to_device/requirements.txt
+++ b/iot/api-client/gcs_file_to_device/requirements.txt
@@ -4,6 +4,6 @@ google-auth-httplib2==0.0.4
 google-cloud-iot==1.0.0
 google-cloud-pubsub==1.7.0
 google-cloud-storage==1.31.0
-cryptography==3.0
+cryptography==3.1
 paho-mqtt==1.5.0
 pyjwt==1.7.1
diff --git a/iot/api-client/http_example/requirements.txt b/iot/api-client/http_example/requirements.txt
index 3e79e2b38f..727b78a57d 100644
--- a/iot/api-client/http_example/requirements.txt
+++ b/iot/api-client/http_example/requirements.txt
@@ -1,4 +1,4 @@
-cryptography==3.0
+cryptography==3.1
 google-api-python-client==1.11.0
 google-auth-httplib2==0.0.4
 google-auth==1.21.0
diff --git a/iot/api-client/manager/requirements.txt b/iot/api-client/manager/requirements.txt
index 1ee03604ef..178db09038 100644
--- a/iot/api-client/manager/requirements.txt
+++ b/iot/api-client/manager/requirements.txt
@@ -1,4 +1,4 @@
-cryptography==3.0
+cryptography==3.1
 flaky==3.7.0
 google-api-python-client==1.11.0
 google-auth-httplib2==0.0.4
diff --git a/iot/api-client/mqtt_example/requirements.txt b/iot/api-client/mqtt_example/requirements.txt
index db2405445d..1f55ebe713 100644
--- a/iot/api-client/mqtt_example/requirements.txt
+++ b/iot/api-client/mqtt_example/requirements.txt
@@ -1,4 +1,4 @@
-cryptography==3.0
+cryptography==3.1
 google-api-python-client==1.11.0
 google-auth-httplib2==0.0.4
 google-auth==1.21.0