diff --git a/user_guide_src/source/documentation/index.rst b/user_guide_src/source/documentation/index.rst
index b080c0e..38124f7 100644
--- a/user_guide_src/source/documentation/index.rst
+++ b/user_guide_src/source/documentation/index.rst
@@ -42,7 +42,7 @@
 
 .. code-block:: bash
 
-	easy_install sphinx
+	easy_install "sphinx==1.2.3"
 	easy_install sphinxcontrib-phpdomain
 
 Then follow the directions in the README file in the :samp:`cilexer` folder