diff --git a/specification/client_server_api.rst b/specification/client_server_api.rst
index e4cd6807..fe1a4398 100644
--- a/specification/client_server_api.rst
+++ b/specification/client_server_api.rst
@@ -17,7 +17,7 @@ Changelog
 {{client_server_changelog}}
 
 For the full historical changelog, see
-https://github.com/matrix-org/matrix-doc/blob/master/changelogs/client-server.rst
+https://github.com/matrix-org/matrix-doc/blob/master/changelogs/client_server.rst
 
 If this is an unstable snapshot, any changes since the last release may be
 viewed using ``git log``.