diff --git a/README.md b/README.md
index 6d3df44..c2f42a3 100755
--- a/README.md
+++ b/README.md
@@ -236,12 +236,18 @@ to something similar to "http://domain/#channel/2011-03-09 14:25:09", or
 
     This option must be set when using Boxcar or Pushover.
 
+    When using the custom URL service, if this option is set it will be used as username
+    for HTTP basic authentication.
+
 *   `secret = ""`
 
     Authentication token for push notifications.
 
     This option must be set when using Notify My Android, Pushover, Prowl, Supertoasty or PushBullet.
 
+    When using the custom URL service, if this option is set it will be used as password
+    for HTTP basic authentication.
+
 *   `target = ""`
 
     Device or target name for push notifications.
@@ -280,6 +286,11 @@ to something similar to "http://domain/#channel/2011-03-09 14:25:09", or
     local scheme to access a mobile application.  Keyword expansion is performed on this
     value.
 
+*   `message_uri_post = "no"`
+
+    When using the custom URL service, this option allows you to specify whether to use the
+    POST method instead of GET.
+
 *   `message_uri_title` = ""`
 
     If you're using Pushover.net, you can specify a title for the `message_uri` option.