Point to the RTD version of the zope2book.

1 files changed, 1 insertions, 1 deletions

diff --git a/docs/using.rst b/docs/using.rst
index 157db3a..a1e5fc0 100644
--- a/docs/using.rst
+++ b/docs/using.rst
@@ -6,7 +6,7 @@ This document focuses on usage of the Page Templates API.
 
 For information about writing Page Templates documents and using TAL
 and TALES, refer to the `reference documentation
-<https://docs.zope.org/zope2/zope2book/AppendixC.html>`_ or the
+<https://zope.readthedocs.io/en/latest/zope2book/AppendixC.html>`_ or the
 `Chameleon documentation
 <https://chameleon.readthedocs.io/en/latest/reference.html>`_ if you
 are using z3c.ptcompat.