diff --git a/samples/api-client/manager/requirements.txt b/samples/api-client/manager/requirements.txt
index d0431a0b..87c7e460 100644
--- a/samples/api-client/manager/requirements.txt
+++ b/samples/api-client/manager/requirements.txt
@@ -1,4 +1,4 @@
 google-api-python-client==1.6.5
 google-auth-httplib2==0.0.3
-google-auth==1.3.0
+google-auth==1.4.0
 google-cloud==0.32.0