diff --git a/jupyter/pyproject.toml.jinja b/jupyter/pyproject.toml.jinja
index 22df8d0..83cf2fc 100644
--- a/jupyter/pyproject.toml.jinja
+++ b/jupyter/pyproject.toml.jinja
@@ -22,6 +22,9 @@ classifiers = [
     "Development Status :: 3 - Alpha",
     "Framework :: Jupyter",
     "Framework :: Jupyter :: JupyterLab",
+    "Framework :: Jupyter :: JupyterLab :: 4",
+    "Framework :: Jupyter :: JupyterLab :: Extensions",
+    "Framework :: Jupyter :: JupyterLab :: Extensions :: Prebuilt",
     "Programming Language :: Python",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",