diff --git a/proposals/2400-kock.md b/proposals/2403-knock.md
similarity index 99%
rename from proposals/2400-kock.md
rename to proposals/2403-knock.md
index e36806d4b..ffaf37e4e 100644
--- a/proposals/2400-kock.md
+++ b/proposals/2403-knock.md
@@ -1,4 +1,4 @@
-# MSC2400: Add "knock" feature
+# MSC2403: Add "knock" feature
 Many people are in invite-only rooms. Sometimes, someone wants to join such a room and can't, as
 they aren't invited. This proposal adds a feature for this user to indicate that they want to join
 said room.