diff --git a/docs/conf.py b/docs/conf.py
index 36dc9768e..02fcc844e 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -157,8 +157,8 @@
 # --
 def setup(app):
     # path relative to _static
-    app.add_stylesheet("theme_overrides.css")
-    app.add_javascript("piwik.js")
+    app.add_css_file("theme_overrides.css")
+    app.add_js_file("piwik.js")
 
 
 # -- Options for intersphinx --------------------------------------------------