diff --git a/go.mod b/go.mod
index 50bc000..d14060e 100644
--- a/go.mod
+++ b/go.mod
@@ -6,6 +6,8 @@
 	github.com/chzyer/logex v1.1.10 // indirect
 	github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e
 	github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1 // indirect
-	golang.org/x/sys v0.0.0-20200803210538-64077c9b5642
+	github.com/google/go-cmp v0.5.1 // indirect
+	golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 	google.golang.org/protobuf v1.25.0
 )