diff --git a/docs/conf.py b/docs/conf.py
index 30bd4a2..89d7c24 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -47,4 +47,4 @@
 
 
 def setup(app):
-    app.add_stylesheet("bottom.css")
+    app.add_css_file("bottom.css")