diff --git a/book/changelog.md b/book/changelog.md
index 1e3d3ff2..747d4d6c 100644
--- a/book/changelog.md
+++ b/book/changelog.md
@@ -220,3 +220,5 @@ This will be the first release of Grapevine since it was forked from Conduit
     [!84](https://gitlab.computer.surgery/matrix/grapevine-fork/-/merge_requests/84))
 15. Added support for Authenticated Media ([MSC3916](https://github.com/matrix-org/matrix-spec-proposals/pull/3916)).
     ([!58](https://gitlab.computer.surgery/matrix/grapevine-fork/-/merge_requests/58))
+16. Added support for configuring and serving `/.well-known/matrix/...` data.
+    ([!90](https://gitlab.computer.surgery/matrix/grapevine-fork/-/merge_requests/90))