plotly
diff --git a/‎CHANGELOG.md
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diff --git a/‎packages/javascript/jupyterlab-plotly/package-lock.json
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diff --git a/‎packages/javascript/jupyterlab-plotly/package.json
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diff --git a/‎packages/python/plotly/plotly/offline/_plotlyjs_version.py
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diff --git a/‎packages/python/plotly/plotly/package_data/plotly.min.js
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@@ -2,6 +2,13 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## UNRELEASED
+
+### Updated
+
+- Updated Plotly.js to from version 2.4.1 to version 2.4.2. See the [plotly.js CHANGELOG](https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md#240----2021-08-27) for more information. These changes are reflected in the auto-generated `plotly.graph_objects` module. Notable changes include:
+  - Bug fix for rendering unified hover labels in classic Jupyter Notebooks
+
 ## [5.3.0] - 2021-08-29
 
 ### Updated
 
@@ -65,7 +65,7 @@
     "@lumino/messaging": "^1.2.3",
     "@lumino/widgets": "^1.8.1",
     "lodash": "^4.17.4",
-    "plotly.js": "^2.4.1"
+    "plotly.js": "^2.4.2"
   },
   "jupyterlab": {
     "extension": "lib/jupyterlab-plugin",
 
@@ -1,3 +1,3 @@
 # DO NOT EDIT
 # This file is generated by the updatebundle setup.py command
-__plotlyjs_version__ = "2.4.1"
+__plotlyjs_version__ = "2.4.2"