diff --git a/conf.py b/conf.py
index 87d9456..b271763 100644
--- a/conf.py
+++ b/conf.py
@@ -97,3 +97,4 @@ epub_cover = ('_static/cover.jpg', '')
 epub_pre_files = [('epub-cover.xhtml', ''), ('epub-copyright.xhtml', '')]
 epub_css_files = ['custom.css', 'custom_epub.css']
 epub_show_urls = 'no'
+epub_exclude_files = ['_static/file.png', '_static/minus.png', '_static/plus.png', '_static/custom_html.css']