diff --git a/51d.md b/51d.md
index 0891f600..5785e085 100644
--- a/51d.md
+++ b/51d.md
@@ -1,4 +1,4 @@
-NIP-51c
+NIP-51d
 ======
 
 Categorized Bookmarks List
@@ -6,4 +6,4 @@ Categorized Bookmarks List
 
 `draft` `optional` `author:fiatjaf` `author:arcbtc` `author:monlovesmango` `author:eskema` 
 
-An event with kind `30001` is defined as a parameterized replaceable list event (see [NIP-51 - Lists](51.md)) for categorizing bookmarks. The 'd' parameter for this event holds the category name of the list. Any standarized tag can be included in a Categorized Bookmarks List.
\ No newline at end of file
+An event with kind `30001` is defined as a parameterized replaceable list event (see [NIP-51 - Lists](51.md)) for categorizing bookmarks. The 'd' parameter for this event holds the category name of the list. Any standarized tag can be included in a Categorized Bookmarks List.