diff --git a/compute/encryption/requirements.txt b/compute/encryption/requirements.txt
index 1d8b7f957621..f4967ba569c4 100644
--- a/compute/encryption/requirements.txt
+++ b/compute/encryption/requirements.txt
@@ -1,4 +1,4 @@
-cryptography==2.9
+cryptography==2.9.1
 requests==2.23.0
 google-api-python-client==1.8.0
 google-auth==1.14.0
diff --git a/iap/requirements.txt b/iap/requirements.txt
index 2e81d83a04ee..c96a8ba7f4b2 100644
--- a/iap/requirements.txt
+++ b/iap/requirements.txt
@@ -1,5 +1,5 @@
 PyJWT==1.7.1
-cryptography==2.9
+cryptography==2.9.1
 flask==1.1.2
 google-auth==1.14.0
 gunicorn==20.0.4
diff --git a/iot/api-client/codelabs/requirements.txt b/iot/api-client/codelabs/requirements.txt
index 274f2df8aaa6..6944b0de8c1c 100644
--- a/iot/api-client/codelabs/requirements.txt
+++ b/iot/api-client/codelabs/requirements.txt
@@ -1,3 +1,3 @@
-cryptography==2.9
+cryptography==2.9.1
 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 83b4d08a5117..860555d39e64 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==2.9
+cryptography==2.9.1
 google-api-python-client==1.8.0
 google-auth-httplib2==0.0.3
 google-auth==1.14.0
diff --git a/iot/api-client/gcs_file_to_device/requirements.txt b/iot/api-client/gcs_file_to_device/requirements.txt
index ff434b72b128..e571c20342a3 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==0.0.3
 google-cloud-iot==1.0.0
 google-cloud-pubsub==1.4.2
 google-cloud-storage==1.26.0
-cryptography==2.9
+cryptography==2.9.1
 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 ebc7677d798d..8e7a3f8a2d4d 100644
--- a/iot/api-client/http_example/requirements.txt
+++ b/iot/api-client/http_example/requirements.txt
@@ -1,4 +1,4 @@
-cryptography==2.9
+cryptography==2.9.1
 google-api-python-client==1.8.0
 google-auth-httplib2==0.0.3
 google-auth==1.14.0
diff --git a/iot/api-client/manager/requirements.txt b/iot/api-client/manager/requirements.txt
index c6087ae5b947..397b1c1bc9b3 100644
--- a/iot/api-client/manager/requirements.txt
+++ b/iot/api-client/manager/requirements.txt
@@ -1,4 +1,4 @@
-cryptography==2.9
+cryptography==2.9.1
 flaky==3.6.1
 google-api-python-client==1.8.0
 google-auth-httplib2==0.0.3
diff --git a/iot/api-client/mqtt_example/requirements.txt b/iot/api-client/mqtt_example/requirements.txt
index 5630624edb22..2805ace20792 100644
--- a/iot/api-client/mqtt_example/requirements.txt
+++ b/iot/api-client/mqtt_example/requirements.txt
@@ -1,4 +1,4 @@
-cryptography==2.9
+cryptography==2.9.1
 flaky==3.6.1
 gcp-devrel-py-tools==0.0.15
 google-api-python-client==1.8.0
diff --git a/kms/api-client/requirements.txt b/kms/api-client/requirements.txt
index aaf2ea5f26ef..19a906ab2712 100644
--- a/kms/api-client/requirements.txt
+++ b/kms/api-client/requirements.txt
@@ -1,2 +1,2 @@
 google-cloud-kms==1.4.0
-cryptography==2.9
+cryptography==2.9.1