diff --git a/docs/cudf/source/conf.py b/docs/cudf/source/conf.py
index 75d4e2751a6..7045d275683 100644
--- a/docs/cudf/source/conf.py
+++ b/docs/cudf/source/conf.py
@@ -269,7 +269,7 @@ def process_class_docstrings(app, what, name, obj, options, lines):
 
 def setup(app):
     app.add_css_file("https://docs.rapids.ai/assets/css/custom.css")
-    app.add_js_file("https://docs.rapids.ai/assets/js/custom.js")
+    app.add_js_file("https://docs.rapids.ai/assets/js/custom.js", loading_method="defer")
     app.connect("doctree-read", resolve_aliases)
     app.connect("missing-reference", ignore_internal_references)
     app.connect("autodoc-process-docstring", process_class_docstrings)