diff --git a/source/conf.py b/source/conf.py
index 8ec17f7..b5d78fc 100644
--- a/source/conf.py
+++ b/source/conf.py
@@ -31,7 +31,7 @@
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = ['sphinx.ext.githubpages']
+extensions = ['sphinx.ext.githubpages', 'sphinx.ext.intersphinx']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
@@ -198,3 +198,13 @@
 epub_exclude_files = ['search.html']
 
 
+# -- Options for intersphinx ----------------------------------------------
+
+intersphinx_mapping = {
+    'python': ('https://docs.python.org/3', None),
+    'django': (
+        'http://docs.djangoproject.com/en/stable/',
+        'http://docs.djangoproject.com/en/stable/_objects/'
+    ),
+}
+