diff --git a/README.md b/README.md
index aad4fe0..3065414 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,12 @@ sudo make uninstall
 rdo [command]
 ```
 
+Or, to get the password from stdin:
+
+```sh
+rdo - [command]
+```
+
 The configuration file has the following variables:
 ```
 group=wheel