diff --git a/cmd/auth/auth.go b/cmd/auth/auth.go
index 01e9352..71b7df1 100644
--- a/cmd/auth/auth.go
+++ b/cmd/auth/auth.go
@@ -126,7 +126,8 @@ func runGatewayServer(config util.Config, store db.Store, cache cache.Cache) {
 
 	opt := runtime.WithMarshalerOption(runtime.MIMEWildcard, &runtime.JSONPb{
 		MarshalOptions: protojson.MarshalOptions{
-			UseProtoNames: true,
+			EmitDefaultValues: true,
+			UseProtoNames:     true,
 		},
 		UnmarshalOptions: protojson.UnmarshalOptions{
 			DiscardUnknown: true,