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 ## Aditional info
 
-Stall and product are _Parameterized Replaceable Events_ according to [NIP-33](https://github.com/nostr-protocol/nips/blob/master/33.md) and use kind `30017` and `30018` respectivelly. See [NIP-45](https://github.com/nostr-protocol/nips/blob/master/45.md) for more details.
+Stall and product are _Parameterized Replaceable Events_ according to [NIP-33](https://github.com/nostr-protocol/nips/blob/master/33.md) and use kind `30017` and `30018` respectivelly. See [NIP-15](https://github.com/nostr-protocol/nips/blob/master/15.md) for more details.
 
 Order placing, invoicing, payment details and order statuses are handled over Nostr using [NIP-04](https://github.com/nostr-protocol/nips/blob/master/04.md).