diff --git a/.gitignore b/.gitignore
index 6d41986f4..443762124 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,3 +21,4 @@ coverage.xml
 .cache
 htmlcov
 docs/source/CHANGELOG.md
+docs/source/changelog.md
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 47c8b4876..2066b8016 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -43,10 +43,12 @@
     "myst_parser",
     "sphinx.ext.autodoc",
     "sphinx.ext.intersphinx",
-    "sphinx.ext.napoleon",
+    "numpydoc",
 ]
 github_project_url = "https://github.com/ipython/traitlets"
 
+numpydoc_show_class_members = False
+
 # Add any paths that contain templates here, relative to this directory.
 # templates_path = ['_templates']
 
diff --git a/pyproject.toml b/pyproject.toml
index 831ab0d8d..6ce13ff22 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,6 +45,7 @@ test = [
 ]
 docs = [
     "myst-parser",
+    "numpydoc",
     "pydata-sphinx-theme",
     "sphinx"
 ]