diff --git a/appengine/flexible/sendgrid/requirements.txt b/appengine/flexible/sendgrid/requirements.txt
index 9e8a47c390c8..149a4f75a7c5 100644
--- a/appengine/flexible/sendgrid/requirements.txt
+++ b/appengine/flexible/sendgrid/requirements.txt
@@ -1,3 +1,3 @@
 Flask==0.12.2
-sendgrid==5.0.1
+sendgrid==5.1.0
 gunicorn==19.7.1
diff --git a/appengine/standard/sendgrid/requirements.txt b/appengine/standard/sendgrid/requirements.txt
index 1b5aa69a87c8..06b827677ca9 100644
--- a/appengine/standard/sendgrid/requirements.txt
+++ b/appengine/standard/sendgrid/requirements.txt
@@ -1 +1 @@
-sendgrid==5.0.1
+sendgrid==5.1.0
diff --git a/endpoints/bookstore-grpc/requirements.txt b/endpoints/bookstore-grpc/requirements.txt
index 9243b51bd758..4039ec25ae1e 100644
--- a/endpoints/bookstore-grpc/requirements.txt
+++ b/endpoints/bookstore-grpc/requirements.txt
@@ -1,2 +1,2 @@
-grpcio==1.4.0
+grpcio==1.6.0
 google-auth==1.0.2
diff --git a/endpoints/getting-started-grpc/requirements.txt b/endpoints/getting-started-grpc/requirements.txt
index c129d42d2357..0702ae68ff72 100644
--- a/endpoints/getting-started-grpc/requirements.txt
+++ b/endpoints/getting-started-grpc/requirements.txt
@@ -1,2 +1,2 @@
-grpcio==1.4.0
-grpcio-tools==1.4.0
+grpcio==1.6.0
+grpcio-tools==1.6.0