diff --git a/69.md b/69.md
index f20a5db7..a91f52b4 100644
--- a/69.md
+++ b/69.md
@@ -77,7 +77,7 @@ The zap request event (kind `9734`):
 * MUST include at least 1 `p` tag specifying the recipient's key, chosen from the original poll event's list of keys 
   * MUST include the same primary hosting relay URL in all `p` tags as is specified in the `e` tag
 * MUST include exactly 1 `poll_option` tag which references the chosen vote option by its corresponding index `n`
-* MUST include a valid `ots` tag, if the original poll event specifies a `closed_at` time
+* MUST include a valid [NIP03](./03.md) `ots` tag, if the original poll event specifies a `closed_at` time
 
 ```json
 ...