diff --git a/README.rst b/README.rst
index 88baef9..0e440df 100644
--- a/README.rst
+++ b/README.rst
@@ -72,7 +72,7 @@ Usage
     $ speedtest-cli -h
     usage: speedtest-cli [-h] [--bytes] [--share] [--simple] [--list]
                          [--server SERVER] [--mini MINI] [--source SOURCE]
-                         [--timeout TIMEOUT] [--version]
+                         [--timeout TIMEOUT] [--secure] [--version]
 
     Command line interface for testing internet bandwidth using speedtest.net.
     --------------------------------------------------------------------------
@@ -91,6 +91,8 @@ Usage
       --mini MINI        URL of the Speedtest Mini server
       --source SOURCE    Source IP address to bind to
       --timeout TIMEOUT  HTTP timeout in seconds. Default 10
+      --secure           Use HTTPS instead of HTTP when communicating with
+                         speedtest.net operated servers
       --version          Show the version number and exit
 
 Inconsistency