diff --git a/chartlets.js/package-lock.json b/chartlets.js/package-lock.json
index 25e755a9..16db3dac 100644
--- a/chartlets.js/package-lock.json
+++ b/chartlets.js/package-lock.json
@@ -8163,7 +8163,7 @@
     },
     "packages/demo": {
       "name": "chartlets-demo",
-      "version": "0.1.0-dev.0",
+      "version": "0.1.0",
       "license": "MIT",
       "dependencies": {
         "@emotion/react": "^11.13.3",
@@ -8195,7 +8195,7 @@
     },
     "packages/lib": {
       "name": "chartlets",
-      "version": "0.1.0-dev.0",
+      "version": "0.1.0",
       "license": "MIT",
       "dependencies": {
         "microdiff": "^1.4",
diff --git a/chartlets.js/packages/demo/package.json b/chartlets.js/packages/demo/package.json
index 7c5baeeb..d088a2e0 100644
--- a/chartlets.js/packages/demo/package.json
+++ b/chartlets.js/packages/demo/package.json
@@ -1,6 +1,6 @@
 {
   "name": "chartlets-demo",
-  "version": "0.1.0-dev.0",
+  "version": "0.1.0",
   "description": "Demonstrator for the Chartlets framework.",
   "type": "module",
   "files": [
diff --git a/chartlets.js/packages/lib/package.json b/chartlets.js/packages/lib/package.json
index 8b6c2557..55e5f627 100644
--- a/chartlets.js/packages/lib/package.json
+++ b/chartlets.js/packages/lib/package.json
@@ -1,6 +1,6 @@
 {
   "name": "chartlets",
-  "version": "0.1.0-dev.0",
+  "version": "0.1.0",
   "description": "An experimental library for integrating interactive charts into existing JavaScript applications.",
   "type": "module",
   "files": [
diff --git a/chartlets.py/CHANGES.md b/chartlets.py/CHANGES.md
index 5bccfbfa..c82683d7 100644
--- a/chartlets.py/CHANGES.md
+++ b/chartlets.py/CHANGES.md
@@ -1,6 +1,7 @@
-## Version 0.1.0 (in development)
 
-* Reorganised Chartlets project to better separate demo from library code.
+## Version 0.1.0 (from 2025/01/14)
+
+* Reorganised Chartlets project to better separate demo from library code. 
   Created separate folder `demo` in `chartlets.py` that contains 
   a demo `server` package and example configuration.
   Also simplified demo server code:
@@ -25,6 +26,7 @@
   - `Slider`
   - `Tabs` and `Tab`
  
+
 ## Version 0.0.29 (from 2024/11/26)
 
 * Fixed a bug that prevents using annotations of type `dict` or `dict[str, T]`.
diff --git a/chartlets.py/chartlets/components/slider.py b/chartlets.py/chartlets/components/slider.py
index 5af692e0..47dbb614 100644
--- a/chartlets.py/chartlets/components/slider.py
+++ b/chartlets.py/chartlets/components/slider.py
@@ -68,7 +68,7 @@ class Slider(Component):
     tooltip: str | None = None
     """Tooltip title. Optional."""
 
-    track: Literal["inverted", "normal"] | False | None = None
+    track: Literal["inverted", "normal"] | bool | None = None
     """The track presentation:
 
     - `normal`: the track will render a bar representing the slider value.
diff --git a/chartlets.py/chartlets/util/assertions.py b/chartlets.py/chartlets/util/assertions.py
index 5018f1c9..db95c6c6 100644
--- a/chartlets.py/chartlets/util/assertions.py
+++ b/chartlets.py/chartlets/util/assertions.py
@@ -30,6 +30,6 @@ def assert_is_instance_of(name: str, value: Any, type_set: Type | tuple[Type, ..
             type_set = (type_set,)
         raise TypeError(
             f"value of {name!r} must be of type"
-            f" {" or ".join(map(lambda t: t.__name__, type_set))},"
+            f" {' or '.join(map(lambda t: t.__name__, type_set))},"
             f" but was {'None' if value is None else type(value).__name__}"
         )
diff --git a/chartlets.py/chartlets/version.py b/chartlets.py/chartlets/version.py
index f7f2ac6e..9f7a875c 100644
--- a/chartlets.py/chartlets/version.py
+++ b/chartlets.py/chartlets/version.py
@@ -1 +1 @@
-version = "0.1.0.dev0"
+version = "0.1.0"