diff --git a/README.mkd b/README.mkd
index 67b08e960..b8175dc02 100644
--- a/README.mkd
+++ b/README.mkd
@@ -49,7 +49,8 @@ Requirements
 ------------
 
 * [Python](http://www.python.org) 2.6.x or 2.7.x.
-* [openssl](http://www.openssl.org/) - installed by default on most systems.
+* [PyOpenSSL](http://pypi.python.org/pypi/pyOpenSSL) 0.12 or newer.
+* [pyasn1](http://pypi.python.org/pypi/pyasn1) 0.1.2 or newer.
 * [urwid](http://excess.org/urwid/) version 0.9.8 or newer.
 * The test suite uses the [pry](http://github.com/cortesi/pry) unit testing
   library.
diff --git a/README.txt b/README.txt
index 92cdd4b84..710091521 100644
--- a/README.txt
+++ b/README.txt
@@ -48,7 +48,8 @@ Requirements
 ------------
 
 * Python_ 2.6.x or 2.7.x.
-* openssl_ - installed by default on most systems.
+* PyOpenSSL_ 0.12 or newer.
+* pyasn1_ 0.1.2 or newer.
 * urwid_  version 0.9.8 or newer.
 * The test suite uses the pry_ unit testing
   library.
@@ -67,8 +68,8 @@ following:
 .. _mitmproxy.org: http://mitmproxy.org
 .. _github.com/cortesi/mitmproxy: http://github.com/cortesi/mitmproxy
 .. _python: http://www.python.org
-.. _openssl: http://www.openssl.org/
+.. _PyOpenSSL: http://pypi.python.org/pypi/pyOpenSSL
+.. _pyasn1: http://pypi.python.org/pypi/pyasn1
 .. _urwid: http://excess.org/urwid/
 .. _pry: http://github.com/cortesi/pry
 .. _countershape: http://github.com/cortesi/countershape
-