diff --git a/doc/conf.py b/doc/conf.py
index b268a13f0..e102c155d 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -36,7 +36,7 @@ epub_scheme = 'url'
 epub_identifier = epub_publisher
 epub_pre_files = [('index', 'Welcome')]
 epub_exclude_files = ['_static/opensearch.xml', '_static/doctools.js',
-    '_static/jquery.js', '_static/searchtools.js',
+    '_static/jquery.js', '_static/searchtools.js', '_static/underscore.js',
     '_static/basic.css', 'search.html']
 
 latex_documents = [('contents', 'sphinx.tex', 'Sphinx Documentation',