diff --git a/Notify_pagerduty.md b/Notify_pagerduty.md
index 8c2f846..01c74bd 100644
--- a/Notify_pagerduty.md
+++ b/Notify_pagerduty.md
@@ -27,6 +27,7 @@ Valid syntax is as follows:
 | component    | No       | Provide a component (string) as part of the payload; the default is **Notification** if one isn't specified.
 | click    | No       | Provide a clickable URL to associate with the notice.
 | image    | No       | Associate the notification status via a represented icon.  You can set this value to `no` if you do not want this to occur.
+| severity | No       | The notification severity is otherwise detected on it's own, however if you wish to force a specific mode always, you can do so by providing this as part of the URL.  Possible values are: `info`, `warning`, `critical`, and `error`.
 
 #### Example
 Send a Pager Duty trigger to our **source** `node01.local` and the **component** `drive_sda`