diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 [![Build Status](https://travis-ci.org/warner/magic-wormhole.svg?branch=master)](https://travis-ci.org/warner/magic-wormhole)
 [![Windows Build Status](https://ci.appveyor.com/api/projects/status/mfnn5rsyfnrq576a/branch/master?svg=true)](https://ci.appveyor.com/project/warner/magic-wormhole)
 [![codecov.io](https://codecov.io/github/warner/magic-wormhole/coverage.svg?branch=master)](https://codecov.io/github/warner/magic-wormhole?branch=master)
+[![Docs](https://readthedocs.org/projects/magic-wormhole/badge/?version=latest)](https://magic-wormhole.readthedocs.io)
 
 Get things from one computer to another, safely.