diff --git a/docs/source/conf.py b/docs/source/conf.py
index 9004d25..fc5a076 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -36,4 +36,4 @@ epub_show_urls = 'footnote'
 
 
 def setup(app):
-   app.add_css_file("quartz.css")
+   app.add_css_file("docs/source/quartz.css")