diff --git a/README.md b/README.md
index c1837c2..2640876 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ NIPs with a relay-specific implementation are listed here.
 - [x] NIP-01: Id/Author prefix search (_experimental_)
 - [x] NIP-02: Hide old contact list events
 - [ ] NIP-03: OpenTimestamps
-- [ ] NIP-05: Mapping Nostr keys to DNS identifiers
+- [x] NIP-05: Mapping Nostr keys to DNS identifiers
 - [ ] NIP-09: Event deletion
 - [x] NIP-11: Relay information document
 - [x] NIP-12: Generic tag search (_experimental_)