diff --git a/51.md b/51.md
index 2f4f883a..9a5f85fb 100644
--- a/51.md
+++ b/51.md
@@ -33,11 +33,11 @@ For example, _mute list_ can contain the public keys of spammers and bad actors
 | Search relays        | 10007 | relays clients should use when performing search queries         | `"relay"` (relay URLs)                                                                                 |
 | Profile badges       | 10008 | [NIP-58](58.md) badges a user has accepted and chosen to display | `"a"` (kind:30009 badge definitions) and `"e"` (kind:8 badge awards), and `"a"` (kind:30008 badge set) |
 | Simple groups        | 10009 | [NIP-29](29.md) groups the user is in                            | `"group"` ([NIP-29](29.md) group id + relay URL + optional group name), `"r"` for each relay in use    |
-| Favorite follow sets | 10011 | user favorite follow sets                                        | `"a"` (kind:30000 follow set)                                                                          |
 | Relay feeds          | 10012 | user favorite browsable relays (and relay sets)                  | `"relay"` (relay URLs) and `"a"` (kind:30002 relay set)                                                |
 | Private relays       | 10013 | (nip44-encrypted) [NIP-37](37.md) private relays (drafts)        | `"relay"` (relay URL)                                                                                  |
 | Interests            | 10015 | topics a user may be interested in and pointers                  | `"t"` (hashtags) and `"a"` (kind:30015 interest set)                                                   |
 | Media follows        | 10020 | multimedia (photos, short video) follow list                     | `"p"` (pubkeys -- with optional relay hint and petname)                                                |
+| Favorite follow sets | 10021 | user favorite follow sets                                        | `"a"` (kind:30000 follow set)                                                                          |
 | Emojis               | 10030 | user preferred emojis and pointers to emoji sets                 | `"emoji"` (see [NIP-30](30.md)) and `"a"` (kind:30030 emoji set)                                       |
 | DM relays            | 10050 | Where to receive [NIP-17](17.md) direct messages                 | `"relay"` (see [NIP-17](17.md))                                                                        |
 | Blossom servers      | 10063 | Servers where to upload and look for images and other blobs      | `"server"` (see [NIP-B7](B7.md))                                                                       |
diff --git a/README.md b/README.md
index a3e37e99..43adc5ca 100644
--- a/README.md
+++ b/README.md
@@ -215,6 +215,7 @@ This table is not exhaustive. For a machine-readable registry of all known event
 | `10015`       | Interests list                  | [51](51.md)                            |
 | `10019`       | Nutzap Mint Recommendation      | [61](61.md)                            |
 | `10020`       | Media follows                   | [51](51.md)                            |
+| `10021`       | Favorite follow sets            | [51](51.md)                            |
 | `10030`       | User emoji list                 | [51](51.md)                            |
 | `10050`       | Relay list to receive DMs       | [51](51.md), [17](17.md)               |
 | `10051`       | KeyPackage Relays List          | [Marmot][marmot]                       |