diff --git a/specification/client_server_api.rst b/specification/client_server_api.rst
index a63ddbef..6ae6a137 100644
--- a/specification/client_server_api.rst
+++ b/specification/client_server_api.rst
@@ -32,6 +32,7 @@ Other versions of this specification
 The following other versions are also available, in reverse chronological order:
 
 - `HEAD <https://matrix.org/speculator/spec/head/client_server.html>`_: Includes all changes since the latest versioned release.
+- `r0.1.0 <https://matrix.org/docs/spec/client_server/r0.1.0.html>`_
 - `r0.0.1 <https://matrix.org/docs/spec/r0.0.1/client_server.html>`_
 - `r0.0.0 <https://matrix.org/docs/spec/r0.0.0/client_server.html>`_
 - `Legacy <https://matrix.org/docs/spec/legacy/#client-server-api>`_: The last draft before the spec was formally released in version r0.0.0.