diff --git a/changelogs/room_versions/newsfragments/1397.feature b/changelogs/room_versions/newsfragments/1397.feature
new file mode 100644
index 00000000..4ffe3415
--- /dev/null
+++ b/changelogs/room_versions/newsfragments/1397.feature
@@ -0,0 +1 @@
+Update the default room version to 10, as per [MSC3904](https://github.com/matrix-org/matrix-spec-proposals/pull/3904).
\ No newline at end of file
diff --git a/content/rooms/_index.md b/content/rooms/_index.md
index ac93e69e..190b305e 100644
--- a/content/rooms/_index.md
+++ b/content/rooms/_index.md
@@ -52,7 +52,7 @@ stable and unstable periodically for a variety of reasons, including
 discovered security vulnerabilities and age.
 
 Clients should not ask room administrators to upgrade their rooms if the
-room is running a stable version. Servers SHOULD use **room version 9** as
+room is running a stable version. Servers SHOULD use **room version 10** as
 the default room version when creating new rooms.
 
 The available room versions are: