diff --git a/buds/11.md b/buds/11.md
index 4d04a36..b24174b 100644
--- a/buds/11.md
+++ b/buds/11.md
@@ -47,7 +47,7 @@ Example authorization token:
 
 ## HTTP Authorization Header
 
-Using the `Authorization` HTTP header, the authorization token SHOULD be encoded as Base64 and using the `Nostr` authorization scheme. Servers MAY also support URL-safe Base64 and padded or unpadded encodings.
+Using the `Authorization` HTTP header, the authorization token SHOULD be encoded as unpadded Base64URL and use the `Nostr` authorization scheme. Servers and clients MAY also support reading other Base64 encodings for compatibility with legacy implementations.
 
 Example HTTP Authorization Header: