diff --git a/samples/snippets/requirements.txt b/samples/snippets/requirements.txt
index 74f7afd7..3c8d13c9 100644
--- a/samples/snippets/requirements.txt
+++ b/samples/snippets/requirements.txt
@@ -1,2 +1,2 @@
-google-cloud-kms==0.2
-cryptography==2.4.2
+google-cloud-kms==0.2.1
+cryptography==2.5