diff --git a/README.rst b/README.rst
index 7bc4b15..3aaa936 100644
--- a/README.rst
+++ b/README.rst
@@ -189,6 +189,9 @@ sort_version_key
   ``vercmp``. Default value is ``parse_version``. ``parse_version`` use 
   ``pkg_resources.parse_version``. ``vercmp`` use ``pyalpm.vercmp``.
 
+proxy
+  The HTTP proxy to use. The format is ``host:port``, e.g. ``localhost:8087``. This requires `pycurl <http://pycurl.sourceforge.net/>`_.
+
 An environment variable ``NVCHECKER_GITHUB_TOKEN`` can be set to a GitHub OAuth token in order to request more frequently than anonymously.
 
 Check BitBucket
@@ -284,6 +287,9 @@ Check `MetaCPAN <https://metacpan.org/>`_ for updates.
 cpan
   The name used on CPAN, e.g. ``YAML``.
 
+proxy
+  The HTTP proxy to use. The format is ``host:port``, e.g. ``localhost:8087``. This requires `pycurl <http://pycurl.sourceforge.net/>`_.
+
 Check Packagist
 ---------------
 Check `Packagist <https://packagist.org/>`_ for updates.