diff --git a/gateway/server.go b/gateway/server.go
index 4a5578ff4..a111f6c72 100644
--- a/gateway/server.go
+++ b/gateway/server.go
@@ -329,8 +329,9 @@ func createDescriptorSource(cli zrpc.Client, up Upstream) (grpcurl.DescriptorSou
 	return source, nil
 }
 
-// withDialer sets a dialer to create a gRPC client.
-func withDialer(dialer func(conf zrpc.RpcClientConf) zrpc.Client) func(*Server) {
+// WithDialer sets a dialer to create a gRPC client.
+// This allows customization of gRPC client options, such as message size limits.
+func WithDialer(dialer func(conf zrpc.RpcClientConf) zrpc.Client) func(*Server) {
 	return func(s *Server) {
 		s.dialer = dialer
 	}
diff --git a/gateway/server_test.go b/gateway/server_test.go
index 7eff9eb47..dfb794658 100644
--- a/gateway/server_test.go
+++ b/gateway/server_test.go
@@ -54,7 +54,7 @@ func TestMustNewServer(t *testing.T) {
 	c.Host = "localhost"
 	c.Port = 18881
 
-	s := MustNewServer(c, withDialer(func(conf zrpc.RpcClientConf) zrpc.Client {
+	s := MustNewServer(c, WithDialer(func(conf zrpc.RpcClientConf) zrpc.Client {
 		return zrpc.MustNewClient(conf, zrpc.WithDialOption(grpc.WithContextDialer(dialer())))
 	}), WithHeaderProcessor(func(header http.Header) []string {
 		return []string{"foo"}