diff --git a/setup.py b/setup.py
index <HASH>..<HASH> 100644
--- a/setup.py
+++ b/setup.py
@@ -159,7 +159,8 @@ setup(
             'Sphinx<=1.6.7',
             'nbsphinx',
             'numpydoc',
-            'recommonmark'
+            'recommonmark',
+            'seaborn'
     ]},
 
     python_requires='>=2.7',
adding seaborn as extra 'dev' dependency (since examples are used in docs). Fixes #<I>