diff --git a/go.mod b/go.mod
index c95f33f..d1ed782 100644
--- a/go.mod
+++ b/go.mod
@@ -1,9 +1,15 @@
 module golang.org/x/oauth2
 
-go 1.15
+go 1.17
 
 require (
 	cloud.google.com/go v0.65.0
+	github.com/google/go-cmp v0.5.1
 	golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd
 	google.golang.org/appengine v1.6.6
 )
+
+require (
+	github.com/golang/protobuf v1.4.2 // indirect
+	google.golang.org/protobuf v1.25.0 // indirect
+)