diff --git a/README.md b/README.md
index 033564b..fef11db 100644
--- a/README.md
+++ b/README.md
@@ -54,6 +54,7 @@ _Libraries for use in ASGI apps._
 _General-purpose middleware to wrap around ASGI apps._
 
 - [datasette-auth-github](https://github.com/simonw/datasette-auth-github) - GitHub OAuth authentication for ASGI apps. Supports restricting to specific users or member of specific teams or organizations.
+- [msgpack-asgi](https://github.com/florimondmanca/msgpack-asgi) - Drop-in MessagePack support for ASGI apps and frameworks.
 - [ProxyHeadersMiddleware](https://github.com/encode/uvicorn/blob/master/uvicorn/middleware/proxy_headers.py) - Use `X-Forwarded-Proto` and `X-Forwarded-For` headers set by a known and trusted proxy to make `client` and `scheme` reference the connecting client (shipped with Uvicorn).
 - [Sentry ASGI](https://docs.sentry.io/platforms/python/asgi/) - Sentry integration for ASGI frameworks (part of `sentry-sdk`).
 - [Starlette middleware](https://www.starlette.io/middleware) - Middleware for CORS, HTTPS redirection, GZip compression, and more (shipped with Starlette).