diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1904ac01bbb..958be0b9cf2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,12 +2,31 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [3.8.1] - 2019-04-19
+
+### Updated
+ - Updated Plotly.js to version 1.47.3. See the
+ [plotly.js CHANGELOG](https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md#plotlyjs-changelog)
+ for more information.
+ 
+### Fixed
+ - Fix MathJax rendering in Firefox ([plotly/plotly.js#3783](https://github.com/plotly/plotly.js/pull/3783))
+ - Fix vertical responsive resizing in exported HTML files
+ ([#1524](https://github.com/plotly/plotly.py/issues/1524),
+ [1525](https://github.com/plotly/plotly.py/pull/1525))
+ 
+### Changed
+ - Reverted change to `layout.legend.itemsizing = 'constant'` in built-in templates
+ that was made in 3.8.0. This resulted in unexpectedly large legend entries in
+ some common cases ([#1526](https://github.com/plotly/plotly.py/pull/1526)) 
+  
 ## [3.8.0] - 2019-04-15
 
 ### Updated
  - Updated Plotly.js to version 1.47.1. See the
  [plotly.js CHANGELOG](https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md#1471----2019-04-10)
  for more information.
+
  
 ### Added
  - Three new trace types: `sunburst` ([plotly/plotly.js#3594](https://github.com/plotly/plotly.js/pull/3594)),
diff --git a/README.md b/README.md
index 4957d6847fd..cf64de35468 100644
--- a/README.md
+++ b/README.md
@@ -78,12 +78,12 @@ Built on top of [plotly.js](https://github.com/plotly/plotly.js), `plotly.py` is
 
 plotly.py may be installed using pip...
 ```
-pip install plotly==3.8.0
+pip install plotly==3.8.1
 ```
 
 or conda.
 ```
-conda install -c plotly plotly=3.8.0
+conda install -c plotly plotly=3.8.1
 ```
 
 ### Jupyter Notebook Support
@@ -126,7 +126,7 @@ set NODE_OPTIONS=--max-old-space-size=4096
 jupyter labextension install @jupyter-widgets/jupyterlab-manager@0.38 --no-build
 
 # FigureWidget support
-jupyter labextension install plotlywidget@0.9.0 --no-build
+jupyter labextension install plotlywidget@0.9.1 --no-build
 
 # offline iplot support
 jupyter labextension install @jupyterlab/plotly-extension@0.18.2 --no-build
diff --git a/js/package-lock.json b/js/package-lock.json
index 7eaf57570dc..6d3b223bf20 100644
--- a/js/package-lock.json
+++ b/js/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "plotlywidget",
-  "version": "0.9.0",
+  "version": "0.9.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/js/package.json b/js/package.json
index 9f379adc65f..aa59e477c79 100644
--- a/js/package.json
+++ b/js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "plotlywidget",
-  "version": "0.9.0",
+  "version": "0.9.1",
   "description": "The plotly.py ipywidgets library",
   "author": "The plotly.py team",
   "license": "MIT",
diff --git a/plotly/_widget_version.py b/plotly/_widget_version.py
index 1aa78cc0c49..bf8ed003270 100644
--- a/plotly/_widget_version.py
+++ b/plotly/_widget_version.py
@@ -2,4 +2,4 @@
 # for automated dev builds
 #
 # It is edited by hand prior to official releases
-__frontend_version__ = '0.9.0'
+__frontend_version__ = '0.9.1'
diff --git a/plotlywidget/static/index.js b/plotlywidget/static/index.js
index 58d9e68ef28..6465ac42026 100644
--- a/plotlywidget/static/index.js
+++ b/plotlywidget/static/index.js
@@ -12642,7 +12642,7 @@ module.exports = function identity(d) { return d; };
 /* 19 */
 /***/ (function(module, exports) {
 
-module.exports = {"name":"plotlywidget","version":"0.9.0","description":"The plotly.py ipywidgets library","author":"The plotly.py team","license":"MIT","main":"src/index.js","repository":{"type":"git","url":"https://github.com/plotly/plotly.py"},"keywords":["jupyter","widgets","ipython","ipywidgets","plotly"],"files":["src/**/*.js","dist/*.js"],"scripts":{"clean":"rimraf dist/ && rimraf ../plotlywidget/static","prepublish":"webpack","test":"echo \"Error: no test specified\" && exit 1"},"devDependencies":{"webpack":"^3.10.0","rimraf":"^2.6.1","ify-loader":"^1.1.0"},"dependencies":{"plotly.js":"1.47.3","@jupyter-widgets/base":"^1.0.0","lodash":"^4.17.4"},"jupyterlab":{"extension":"src/jupyterlab-plugin"}}
+module.exports = {"name":"plotlywidget","version":"0.9.1","description":"The plotly.py ipywidgets library","author":"The plotly.py team","license":"MIT","main":"src/index.js","repository":{"type":"git","url":"https://github.com/plotly/plotly.py"},"keywords":["jupyter","widgets","ipython","ipywidgets","plotly"],"files":["src/**/*.js","dist/*.js"],"scripts":{"clean":"rimraf dist/ && rimraf ../plotlywidget/static","prepublish":"webpack","test":"echo \"Error: no test specified\" && exit 1"},"devDependencies":{"webpack":"^3.10.0","rimraf":"^2.6.1","ify-loader":"^1.1.0"},"dependencies":{"plotly.js":"1.47.3","@jupyter-widgets/base":"^1.0.0","lodash":"^4.17.4"},"jupyterlab":{"extension":"src/jupyterlab-plugin"}}
 
 /***/ }),
 /* 20 */