diff --git a/XX.md b/41.md
similarity index 100%
rename from XX.md
rename to 41.md
diff --git a/README.md b/README.md
index 634efa3..c51b4a2 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ NIPs stand for **Nostr Implementation Possibilities**. They exist to document wh
 - [NIP-35: User Discovery](35.md)
 - [NIP-36: Sensitive Content](36.md)
 - [NIP-40: Expiration Timestamp](40.md)
-- [NIP-XX: Surveys/Polls](XX.md)
+- [NIP-41: Surveys/Polls](41.md)
 
 ## Event Kinds