diff --git a/.gitignore b/.gitignore
index 66f40976..a212f944 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,6 +22,7 @@ version.py
 .ipynb_checkpoints/
 .mypy*/
 .pytest_cache/
+.virtual_documents/
 __pycache__/
 coverage.*
 htmlcov/
diff --git a/setup.cfg b/setup.cfg
index 8a48ebf6..5e4037b0 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -72,7 +72,9 @@ jupyter =
     %(doc)s
     jupyterlab >=3.0
     jupyterlab-code-formatter
+    jupyterlab-lsp
     jupyterlab-myst
+    python-lsp-server[rope]
     ypy-websocket <0.8.3; python_version <"3.8.0"
 test =
     nbmake