diff --git a/.gitignore b/.gitignore
index 79757a97..156ef1c3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -28,6 +28,7 @@ version.py
 .ipynb_checkpoints/
 .mypy*/
 .pytest_cache/
+.virtual_documents/
 __pycache__/
 htmlcov/
 prof/
diff --git a/setup.cfg b/setup.cfg
index 376c6931..526ba77f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -106,7 +106,9 @@ jupyter =
     ipywidgets
     jupyterlab
     jupyterlab-code-formatter
+    jupyterlab-lsp
     jupyterlab-myst; python_version >="3.7.0"
+    python-lsp-server[rope]
     ypy-websocket <0.8.3; python_version=="3.7.*"
 dev =
     %(all)s