diff --git a/docs/conf.py b/docs/conf.py
index dcb64fa..f3e2e15 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -20,6 +20,7 @@ author = "Project Jupyter Contributors"
 #
 extensions = [
     "sphinx_copybutton",
+    "sphinx.ext.intersphinx",
     "sphinxext.opengraph",
     "sphinxext.rediraffe",
     "myst_parser",