diff --git a/kms/attestations/requirements.txt b/kms/attestations/requirements.txt
index c8639da017b8..1c2e2d8273bd 100644
--- a/kms/attestations/requirements.txt
+++ b/kms/attestations/requirements.txt
@@ -1,2 +1,2 @@
-cryptography==3.0
+cryptography==3.1
 pem==20.1.0
diff --git a/kms/snippets/requirements.txt b/kms/snippets/requirements.txt
index f829e4a9caf6..6e4d9973c20c 100644
--- a/kms/snippets/requirements.txt
+++ b/kms/snippets/requirements.txt
@@ -1,2 +1,2 @@
 google-cloud-kms==1.4.0
-cryptography==3.0
+cryptography==3.1