diff --git a/go.mod b/go.mod
index 09fe4430..25c52c91 100644
--- a/go.mod
+++ b/go.mod
@@ -34,7 +34,7 @@ require (
 	golang.org/x/net v0.0.0-20210503060351-7fd8e65b6420
 	golang.org/x/oauth2 v0.0.0-20210805134026-6f1e6394065a
 	google.golang.org/api v0.53.0
-	google.golang.org/grpc v1.39.1
+	google.golang.org/grpc v1.40.0
 	google.golang.org/protobuf v1.27.1
 	gopkg.in/square/go-jose.v2 v2.6.0
 )
diff --git a/go.sum b/go.sum
index e0a0652f..4d8488d9 100644
--- a/go.sum
+++ b/go.sum
@@ -805,8 +805,9 @@ google.golang.org/grpc v1.37.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQ
 google.golang.org/grpc v1.37.1/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
 google.golang.org/grpc v1.38.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
 google.golang.org/grpc v1.39.0/go.mod h1:PImNr+rS9TWYb2O4/emRugxiyHZ5JyHW5F+RPnDzfrE=
-google.golang.org/grpc v1.39.1 h1:f37vZbBVTiJ6jKG5mWz8ySOBxNqy6ViPgyhSdVnxF3E=
 google.golang.org/grpc v1.39.1/go.mod h1:PImNr+rS9TWYb2O4/emRugxiyHZ5JyHW5F+RPnDzfrE=
+google.golang.org/grpc v1.40.0 h1:AGJ0Ih4mHjSeibYkFGh1dD9KJ/eOtZ93I6hoHhukQ5Q=
+google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
 google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.1.0/go.mod h1:6Kw0yEErY5E/yWrBtf03jp27GLLJujG4z/JK95pnjjw=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=