diff --git a/README.md b/README.md
index 1ef0ec80..829e61ba 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,7 @@ NIPs stand for **Nostr Implementation Possibilities**. They exist to document wh
 - [NIP-36: Sensitive Content](36.md)
 - [NIP-40: Expiration Timestamp](40.md)
 - [NIP-42: Authentication of clients to relays](42.md)
+- [NIP-50: Keywords filter](50.md)
 
 ## Event Kinds