diff --git a/strfry.conf b/strfry.conf
index 7c07c67c..03591345 100644
--- a/strfry.conf
+++ b/strfry.conf
@@ -59,7 +59,7 @@ relay {
         # NIP-11: Detailed information about relay, free-form
         description = "This is a strfry instance."
 
-        # NIP-11: Administrative nostr pubkey, for contact purposes
+        # NIP-11: Administrative nostr pubkey (in 32-byte HEX format), for contact purposes
         pubkey = ""
 
         # NIP-11: Alternative administrative contact (email, website, etc)