diff --git a/doc/apidoc/conf.py b/doc/apidoc/conf.py
index 05d3e097b9..c0e5acb61d 100644
--- a/doc/apidoc/conf.py
+++ b/doc/apidoc/conf.py
@@ -202,4 +202,4 @@
 
 
 def setup(app):
-    app.add_stylesheet("plotly-style.css")  # also can be a full URL
+    app.add_css_file("plotly-style.css")  # also can be a full URL