diff --git a/go.mod b/go.mod
index 7fd5b964..08706230 100644
--- a/go.mod
+++ b/go.mod
@@ -39,7 +39,7 @@ require (
 	golang.org/x/net v0.0.0-20181114220301-adae6a3d119a // indirect
 	golang.org/x/oauth2 v0.0.0-20181120190819-8f65e3013eba // indirect
 	golang.org/x/sync v0.0.0-20181108010431-42b317875d0f // indirect
-	golang.org/x/sys v0.0.0-20181122145206-62eef0e2fa9b
+	golang.org/x/sys v0.0.0-20181122145206-62eef0e2fa9b // indirect
 	golang.org/x/time v0.0.0-20181108054448-85acf8d2951c // indirect
 	google.golang.org/appengine v1.3.0 // indirect
 	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect