diff --git a/samples/snippets/requirements.txt b/samples/snippets/requirements.txt
index efc7be5e..a9b47ef6 100644
--- a/samples/snippets/requirements.txt
+++ b/samples/snippets/requirements.txt
@@ -1,2 +1,2 @@
 google-cloud-kms==1.2.1
-cryptography==2.7
+cryptography==2.8