diff --git a/README.md b/README.md
index 5b9d8bc..e71e723 100644
--- a/README.md
+++ b/README.md
@@ -295,6 +295,7 @@ PARAMETER | REQUIRED | DESCRIPTION | TYPE | CONTAINS
 **email** |  required  | User's Email (Mailbox to search) | string |  `email` 
 **internet_message_id** |  required  | Internet Message ID | string |  `internet message id` 
 **extract_attachments** |  optional  | Add attachments to vault and create vault artifacts | boolean | 
+**extract_nested** |  optional  | Works when `extract_attachments` is set to `true`. Extracts attachments from nested email attachments. | boolean | 
 
 #### Action Output
 DATA PATH | TYPE | CONTAINS | EXAMPLE VALUES