diff --git a/doc/conf.py b/doc/conf.py
index 124d7fd6..ac828c2c 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -88,7 +88,7 @@ extensions = ['sphinx.ext.autodoc',
               'sphinx.ext.viewcode',
               'sphinx.ext.pngmath',
               'ipython_directive',
-              'ipython_console_highlighting.py'
+              'ipython_console_highlighting'
               #'matplotlib.sphinxext.mathmpl',
               #'matplotlib.sphinxext.only_directives',
               #'matplotlib.sphinxext.plot_directive',