diff --git a/17.md b/17.md
index 806cc8c..bca9bbd 100644
--- a/17.md
+++ b/17.md
@@ -50,7 +50,8 @@ Kind `14`s MUST never be signed. If it is signed, the message might leak to rela
     ["subject", "<conversation-title>"],
     ["file-type", "<file-mime-type>"],
     ["encryption-algorithm", "<encryption-algorithm>"],
-    ["decryption-key", "<decryption-key>"]
+    ["decryption-key", "<decryption-key>"],
+    ["decryptiion-nonce", "<decryption-nonce>"],
     // rest of tags...
   ],
   "content": "<file-url-or-base64-content-in-plain-text>"
@@ -62,6 +63,7 @@ Kind 15 is used for sending encrypted file event messages:
 - `file-type`: Specifies the MIME type of the attached file (e.g., `image/jpeg`, `audio/mpeg`, etc.).
 - `encryption-algorithm`: Indicates the encryption algorithm used for encrypting the file. Supported algorithms may include `aes-gcm`, `chacha20-poly1305`,`aes-cbc` etc.
 - `decryption-key`: The decryption key that will be used by the recipient to decrypt the file.
+- `decryption-nonce`: The decryption nonce that will be used by the recipient to decrypt the file.
 - `content`: Contains either the URL of the file (`<file-url>`) or the encrypted data in base64 format (`<base64-content-in-plain-text>`).
 
 ## Chat Rooms