diff --git a/README.md b/README.md
index bb9641e4..e3c03914 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,8 @@
 [![quality: alpha](https://img.shields.io/badge/quality-alpha-orange.svg)](#status)
 [![Slack](https://img.shields.io/badge/join%20slack-%23grpc--web-brightgreen.svg)](https://join.slack.com/t/improbable-eng/shared_invite/enQtMzQ1ODcyMzQ5MjM4LWY5ZWZmNGM2ODc5MmViNmQ3ZTA3ZTY3NzQwOTBlMTkzZmIxZTIxODk0OWU3YjZhNWVlNDU3MDlkZGViZjhkMjc)
 
+> Please note that this repo is in maintenance mode, and we recommend users migrate to the official grpc-web client: https://github.com/grpc/grpc-web.
+
 [gRPC](http://www.grpc.io/) is a modern, [HTTP2](https://hpbn.co/http2/)-based protocol, that provides RPC semantics using the strongly-typed *binary* data format of [protocol buffers](https://developers.google.com/protocol-buffers/docs/overview) across multiple languages (C++, C#, Golang, Java, Python, NodeJS, ObjectiveC, etc.)
 
 [gRPC-Web](https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-WEB.md) is a cutting-edge spec that enables invoking gRPC services from *modern* browsers.