DEMO fixed with jupyter-widgets/ipywidgets#4002

Author: Alan

pyproject.toml

@@ -44,7 +44,7 @@ classifiers = [
 ]
 dependencies = [
     "ipython<10",
-    "ipywidgets>=7.6.0,<9",
+    "ipywidgets @ https://github.com/fleming79/ipylab/releases/download/v2.0.9/ipywidgets-8.1.8-py3-none-any.whl",
     "matplotlib>=3.5.0,<4",
     "numpy",
     "pillow",
@@ -74,6 +74,10 @@ Repository = "https://github.com/matplotlib/ipympl"
 ipympl = "ipympl.backend_nbagg"
 widget = "ipympl.backend_nbagg"
 
+[tool.hatch.metadata]
+allow-direct-references = true
+
+
 [tool.hatch.build]
 artifacts = [
     "ipympl/nbextension/index.*",