diff --git a/kms/api-client/requirements.txt b/kms/api-client/requirements.txt
index 81377367ece..c10519b9857 100644
--- a/kms/api-client/requirements.txt
+++ b/kms/api-client/requirements.txt
@@ -1,2 +1,2 @@
-google-cloud-kms==1.3.0
+google-cloud-kms==1.4.0
 cryptography==2.8