diff --git a/README.md b/README.md
index 0441318..96bba42 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,13 @@ And then execute:
 
 If your `chruby-exec` is located in some custom path, you can tweak `chruby_exec` option to set it.
 
+Capistrano::chruby sets `:chruby_map_bins` to prefix `rake`, `gem`, `bundle`, `ruby`. If you'd like
+to add custom executables to be prefixed with a `chruby exec` you can add them to the list.
+
+  ```
+  set :chruby_map_bins, fetch(:chruby_map_bins, []).push('my_new_binary')
+  ```
+
 ## Contributing
 
 1. Fork it