diff --git a/README.rst b/README.rst
index 46ca1ef..654ece0 100644
--- a/README.rst
+++ b/README.rst
@@ -6,6 +6,15 @@ trame-code |pypi_download|
 
 Widget for Monaco VS code editor for trame
 
+The editor can surface language features (autocomplete and hover
+documentation) from your own server-side callbacks: pass ``completion``
+and ``hover`` callables to the widget. The example below shows Python/VTK
+completion and a hover docstring driven entirely from those callbacks.
+
+.. image:: https://raw.githubusercontent.com/Kitware/trame-code/master/docs/completion-hover.png
+   :alt: Monaco editor showing Python/VTK completion and a hover docstring
+   :align: center
+
 
 License
 -----------------------------------------------------------
diff --git a/docs/completion-hover.png b/docs/completion-hover.png
new file mode 100644
index 0000000..03f1276
Binary files /dev/null and b/docs/completion-hover.png differ
diff --git a/src/trame_code/module/__init__.py b/src/trame_code/module/__init__.py
index 3e9bf6d..d36a198 100644
--- a/src/trame_code/module/__init__.py
+++ b/src/trame_code/module/__init__.py
@@ -1,16 +1,22 @@
 from pathlib import Path
 
+from trame_code import __version__
+
 # Compute local path to serve
 serve_path = str(Path(__file__).with_name("serve").resolve())
 
+# Version the served directory so a client re-fetches JS/CSS after an upgrade
+# instead of getting a stale bundle from the browser cache.
+serve_directory = f"__trame_code_{__version__}"
+
 # Serve directory for JS/CSS files
-serve = {"__trame_code": serve_path}
+serve = {serve_directory: serve_path}
 
 # List of JS files to load (usually from the serve path above)
-scripts = ["__trame_code/trame-code.umd.js"]
+scripts = [f"{serve_directory}/trame-code.umd.js"]
 
 # List of CSS files to load (usually from the serve path above)
-styles = ["__trame_code/style.css"]
+styles = [f"{serve_directory}/style.css"]
 
 # List of Vue plugins to install/load
 vue_use = ["trame_code"]