diff --git a/README.md b/README.md
index a1922157..d83514b4 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,7 @@ Damus has also graciously received donations or grants from hundreds of Damus us
 damus implements the following [Nostr Implementation Possibilities][nips]
 
 - [NIP-01: Basic protocol flow][nip01]
+- [NIP-04: Encrypted direct message][nip04]
 - [NIP-08: Mentions][nip08]
 - [NIP-10: Reply conventions][nip10]
 - [NIP-12: Generic tag queries (hashtags)][nip12]
@@ -41,6 +42,7 @@ damus implements the following [Nostr Implementation Possibilities][nips]
 
 [nips]: https://github.com/nostr-protocol/nips
 [nip01]: https://github.com/nostr-protocol/nips/blob/master/01.md
+[nip04]: https://github.com/nostr-protocol/nips/blob/master/04.md
 [nip08]: https://github.com/nostr-protocol/nips/blob/master/08.md
 [nip10]: https://github.com/nostr-protocol/nips/blob/master/10.md
 [nip12]: https://github.com/nostr-protocol/nips/blob/master/12.md