diff --git a/book/changelog.md b/book/changelog.md
index b34d3412..5403d6c4 100644
--- a/book/changelog.md
+++ b/book/changelog.md
@@ -132,6 +132,10 @@ This will be the first release of Grapevine since it was forked from Conduit
 12. **BREAKING:** Disable unauthenticated access to media by default, set the
     `serve_media_unauthenticated` config option to `true` to enable it.
     ([!103](https://gitlab.computer.surgery/matrix/grapevine/-/merge_requests/103))
+13. **BREAKING:** Split CLI into multiple subcommands. The CLI invocation to run
+    the server is now behind the `serve` command, so `grapevine --config ...`
+    becomes `grapevine serve --config ...`.
+    ([!108](https://gitlab.computer.surgery/matrix/grapevine/-/merge_requests/108))
 
 ### Fixed