diff --git a/README.md b/README.md
index 71d0868..274868a 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@ They exist to document what may be implemented by [Nostr](https://github.com/nos
 - [NIP-18: Reposts](18.md)
 - [NIP-19: bech32-encoded entities](19.md)
 - [NIP-20: Command Results](20.md)
-- [NIP-21: `nostr:` URL scheme](21.md)
+- [NIP-21: `nostr:` URI scheme](21.md)
 - [NIP-22: Event `created_at` Limits](22.md)
 - [NIP-23: Long-form Content](23.md)
 - [NIP-25: Reactions](25.md)