diff --git a/README.rst b/README.rst
index 1d04e46..65ac6ec 100644
--- a/README.rst
+++ b/README.rst
@@ -113,6 +113,9 @@ oldver
 newver
   Specify a version record file to store the new version info.
 
+proxy
+  The HTTP proxy to use. The format is ``host:port``, e.g. ``localhost:8087``.
+
 Search in a Webpage
 -------------------
 Search through a specific webpage for the version string. This type of version finding has these fields: