diff --git a/samples/appengine/flexible/tasks/requirements.txt b/samples/appengine/flexible/tasks/requirements.txt
index 7f61fe1f..3d80a1f5 100644
--- a/samples/appengine/flexible/tasks/requirements.txt
+++ b/samples/appengine/flexible/tasks/requirements.txt
@@ -1,6 +1,6 @@
 Flask==0.12.2
 google-api-python-client==1.6.4
-google-auth==1.2.0
-google-auth-httplib2==0.0.2
+google-auth==1.2.1
+google-auth-httplib2==0.0.3
 google-cloud-datastore==1.4.0
 gunicorn==19.7.1