diff --git a/proposals/xxxx-device-authorization-grant.md b/proposals/4341-device-authorization-grant.md
similarity index 99%
rename from proposals/xxxx-device-authorization-grant.md
rename to proposals/4341-device-authorization-grant.md
index 77c07b580..d5fae73d8 100644
--- a/proposals/xxxx-device-authorization-grant.md
+++ b/proposals/4341-device-authorization-grant.md
@@ -1,4 +1,4 @@
-# MSC0000: Support for RFC 8628 Device Authorization Grant
+# MSC4341: Support for RFC 8628 Device Authorization Grant
 
 The current [OAuth 2.0 API](https://spec.matrix.org/v1.15/client-server-api/#oauth-20-api) requires the user to complete
 authentication using a web browser on the device where the Matrix client is running.