diff --git a/CHANGELOG.md b/CHANGELOG.md
index f046503bfd8..99f2440e7ed 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,37 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [3.8.0] - 2019-04-19
 
+### 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)),
+ `waterfall` ([plotly/plotly.js#3531](https://github.com/plotly/plotly.js/pull/3531)),
+ and `volume` ([plotly/plotly.js#3488](https://github.com/plotly/plotly.js/pull/3488)).
+ - New `plotly.io.to_html` and `plotly.io.write_html` functions to export
+ figures as html ([#1474](https://github.com/plotly/plotly.py/pull/1474)).
+ - Added `animation_opts` argument to `plotly.offline.plot` and
+ `plotly.offline.iplot` to control the auto-play animation settings
+ ([#1503](https://github.com/plotly/plotly.py/pull/1503)).  Special thanks
+ to [@TakodaS](https://github.com/TakodaS) for this contribution!
+  
+
+### Fixed
+ - Fix race condition when checking the permissions of the `.plotly` settings
+ directory ([#1498](https://github.com/plotly/plotly.py/pull/1498)). Special
+ thanks to [@pb-cdunn](https://github.com/pb-cdunn) for this contribution!
+ - Fix `OSError` when processing time series data using Python 3.7+
+ ([#1402](https://github.com/plotly/plotly.py/issues/1402),
+ [#1501](https://github.com/plotly/plotly.py/pull/1501))
+ 
+### Updated
+ - Align hoverlabels left and set legend items to constant-size in builtin
+ themes ([#1520](https://github.com/plotly/plotly.py/pull/1520))
+ 
 ## [3.7.1] - 2019-03-19
 
 ### Fixed
diff --git a/README.md b/README.md
index e5ab4ce57ed..4957d6847fd 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==3.7.1
+pip install plotly==3.8.0
 ```
 
 or conda.
 ```
-conda install -c plotly plotly=3.7.1
+conda install -c plotly plotly=3.8.0
 ```
 
 ### 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@0.8.0 --no-build
+jupyter labextension install plotlywidget@0.9.0 --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 e3543c265e3..a2f71100fed 100644
--- a/js/package-lock.json
+++ b/js/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "plotlywidget",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/js/package.json b/js/package.json
index 2ccfcf0ae36..1ca719218ef 100644
--- a/js/package.json
+++ b/js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "plotlywidget",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "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 c15b4b7680c..1aa78cc0c49 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__ = '0.8.0'
+__frontend_version__ = '0.9.0'
diff --git a/plotly/package_data/templates/ggplot2.json b/plotly/package_data/templates/ggplot2.json
index 3593fadd686..51b37e8525c 100644
--- a/plotly/package_data/templates/ggplot2.json
+++ b/plotly/package_data/templates/ggplot2.json
@@ -1 +1 @@
-{"layout": {"colorway": ["#F8766D", "#A3A500", "#00BF7D", "#00B0F6", "#E76BF3"], "font": {"color": "rgb(51,51,51)"}, "hovermode": "closest", "paper_bgcolor": "white", "plot_bgcolor": "rgb(237,237,237)", "polar": {"bgcolor": "rgb(237,237,237)", "angularaxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside"}, "radialaxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside"}}, "ternary": {"bgcolor": "rgb(237,237,237)", "aaxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside"}, "baxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside"}, "caxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside"}}, "colorscale": {"sequential": [[0, "rgb(20,44,66)"], [1, "rgb(90,179,244)"]], "sequentialminus": [[0, "rgb(20,44,66)"], [1, "rgb(90,179,244)"]]}, "xaxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside", "zerolinecolor": "white", "automargin": true}, "yaxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside", "zerolinecolor": "white", "automargin": true}, "scene": {"xaxis": {"backgroundcolor": "rgb(237,237,237)", "gridcolor": "white", "linecolor": "white", "showbackground": true, "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside", "zerolinecolor": "white", "gridwidth": 2}, "yaxis": {"backgroundcolor": "rgb(237,237,237)", "gridcolor": "white", "linecolor": "white", "showbackground": true, "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside", "zerolinecolor": "white", "gridwidth": 2}, "zaxis": {"backgroundcolor": "rgb(237,237,237)", "gridcolor": "white", "linecolor": "white", "showbackground": true, "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside", "zerolinecolor": "white", "gridwidth": 2}}, "shapedefaults": {"fillcolor": "black", "line": {"width": 0}, "opacity": 0.3}, "annotationdefaults": {"arrowhead": 0, "arrowwidth": 1}, "geo": {"bgcolor": "white", "landcolor": "rgb(237,237,237)", "subunitcolor": "white", "showland": true, "showlakes": true, "lakecolor": "white"}}, "data": {"histogram2dcontour": [{"type": "histogram2dcontour", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}, "autocolorscale": true}], "choropleth": [{"type": "choropleth", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}], "histogram2d": [{"type": "histogram2d", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}, "autocolorscale": true}], "heatmap": [{"type": "heatmap", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}, "autocolorscale": true}], "heatmapgl": [{"type": "heatmapgl", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}], "contourcarpet": [{"type": "contourcarpet", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}], "contour": [{"type": "contour", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}, "autocolorscale": true}], "surface": [{"type": "surface", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}], "mesh3d": [{"type": "mesh3d", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}], "scatter": [{"type": "scatter", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "parcoords": [{"type": "parcoords", "line": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "scatterpolargl": [{"type": "scatterpolargl", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "bar": [{"marker": {"line": {"color": "rgb(237,237,237)", "width": 0.5}}, "type": "bar"}], "scattergeo": [{"type": "scattergeo", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "scatterpolar": [{"type": "scatterpolar", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "histogram": [{"type": "histogram", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "scattergl": [{"type": "scattergl", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "scatter3d": [{"type": "scatter3d", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "scattermapbox": [{"type": "scattermapbox", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "scatterternary": [{"type": "scatterternary", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "scattercarpet": [{"type": "scattercarpet", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "carpet": [{"aaxis": {"endlinecolor": "rgb(51,51,51)", "gridcolor": "white", "linecolor": "white", "minorgridcolor": "white", "startlinecolor": "rgb(51,51,51)"}, "baxis": {"endlinecolor": "rgb(51,51,51)", "gridcolor": "white", "linecolor": "white", "minorgridcolor": "white", "startlinecolor": "rgb(51,51,51)"}, "type": "carpet"}], "table": [{"cells": {"fill": {"color": "rgb(237,237,237)"}, "line": {"color": "white"}}, "header": {"fill": {"color": "rgb(217,217,217)"}, "line": {"color": "white"}}, "type": "table"}], "barpolar": [{"marker": {"line": {"color": "rgb(237,237,237)", "width": 0.5}}, "type": "barpolar"}]}}
\ No newline at end of file
+{"layout": {"colorway": ["#F8766D", "#A3A500", "#00BF7D", "#00B0F6", "#E76BF3"], "font": {"color": "rgb(51,51,51)"}, "hovermode": "closest", "hoverlabel": {"align": "left"}, "legend": {"itemsizing": "constant"}, "paper_bgcolor": "white", "plot_bgcolor": "rgb(237,237,237)", "polar": {"bgcolor": "rgb(237,237,237)", "angularaxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside"}, "radialaxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside"}}, "ternary": {"bgcolor": "rgb(237,237,237)", "aaxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside"}, "baxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside"}, "caxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside"}}, "colorscale": {"sequential": [[0, "rgb(20,44,66)"], [1, "rgb(90,179,244)"]], "sequentialminus": [[0, "rgb(20,44,66)"], [1, "rgb(90,179,244)"]]}, "xaxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside", "zerolinecolor": "white", "automargin": true}, "yaxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside", "zerolinecolor": "white", "automargin": true}, "scene": {"xaxis": {"backgroundcolor": "rgb(237,237,237)", "gridcolor": "white", "linecolor": "white", "showbackground": true, "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside", "zerolinecolor": "white", "gridwidth": 2}, "yaxis": {"backgroundcolor": "rgb(237,237,237)", "gridcolor": "white", "linecolor": "white", "showbackground": true, "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside", "zerolinecolor": "white", "gridwidth": 2}, "zaxis": {"backgroundcolor": "rgb(237,237,237)", "gridcolor": "white", "linecolor": "white", "showbackground": true, "showgrid": true, "tickcolor": "rgb(51,51,51)", "ticks": "outside", "zerolinecolor": "white", "gridwidth": 2}}, "shapedefaults": {"fillcolor": "black", "line": {"width": 0}, "opacity": 0.3}, "annotationdefaults": {"arrowhead": 0, "arrowwidth": 1}, "geo": {"bgcolor": "white", "landcolor": "rgb(237,237,237)", "subunitcolor": "white", "showland": true, "showlakes": true, "lakecolor": "white"}}, "data": {"histogram2dcontour": [{"type": "histogram2dcontour", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}, "autocolorscale": true}], "choropleth": [{"type": "choropleth", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}], "histogram2d": [{"type": "histogram2d", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}, "autocolorscale": true}], "heatmap": [{"type": "heatmap", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}, "autocolorscale": true}], "heatmapgl": [{"type": "heatmapgl", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}], "contourcarpet": [{"type": "contourcarpet", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}], "contour": [{"type": "contour", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}, "autocolorscale": true}], "surface": [{"type": "surface", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}], "mesh3d": [{"type": "mesh3d", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}], "scatter": [{"type": "scatter", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "parcoords": [{"type": "parcoords", "line": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "scatterpolargl": [{"type": "scatterpolargl", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "bar": [{"marker": {"line": {"color": "rgb(237,237,237)", "width": 0.5}}, "type": "bar"}], "scattergeo": [{"type": "scattergeo", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "scatterpolar": [{"type": "scatterpolar", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "histogram": [{"type": "histogram", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "scattergl": [{"type": "scattergl", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "scatter3d": [{"type": "scatter3d", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "scattermapbox": [{"type": "scattermapbox", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "scatterternary": [{"type": "scatterternary", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "scattercarpet": [{"type": "scattercarpet", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(237,237,237)", "ticklen": 6, "ticks": "inside"}}}], "carpet": [{"aaxis": {"endlinecolor": "rgb(51,51,51)", "gridcolor": "white", "linecolor": "white", "minorgridcolor": "white", "startlinecolor": "rgb(51,51,51)"}, "baxis": {"endlinecolor": "rgb(51,51,51)", "gridcolor": "white", "linecolor": "white", "minorgridcolor": "white", "startlinecolor": "rgb(51,51,51)"}, "type": "carpet"}], "table": [{"cells": {"fill": {"color": "rgb(237,237,237)"}, "line": {"color": "white"}}, "header": {"fill": {"color": "rgb(217,217,217)"}, "line": {"color": "white"}}, "type": "table"}], "barpolar": [{"marker": {"line": {"color": "rgb(237,237,237)", "width": 0.5}}, "type": "barpolar"}]}}
\ No newline at end of file
diff --git a/plotly/package_data/templates/plotly.json b/plotly/package_data/templates/plotly.json
index 34ab4555687..cd75fe07e4a 100644
--- a/plotly/package_data/templates/plotly.json
+++ b/plotly/package_data/templates/plotly.json
@@ -1 +1 @@
-{"layout": {"colorway": ["#636efa", "#EF553B", "#00cc96", "#ab63fa", "#19d3f3", "#e763fa", "#FECB52", "#FFA15A", "#FF6692", "#B6E880"], "font": {"color": "#2a3f5f"}, "hovermode": "closest", "paper_bgcolor": "white", "plot_bgcolor": "#E5ECF6", "polar": {"bgcolor": "#E5ECF6", "angularaxis": {"gridcolor": "white", "linecolor": "white", "ticks": ""}, "radialaxis": {"gridcolor": "white", "linecolor": "white", "ticks": ""}}, "ternary": {"bgcolor": "#E5ECF6", "aaxis": {"gridcolor": "white", "linecolor": "white", "ticks": ""}, "baxis": {"gridcolor": "white", "linecolor": "white", "ticks": ""}, "caxis": {"gridcolor": "white", "linecolor": "white", "ticks": ""}}, "colorscale": {"sequential": [[0.0, "#0508b8"], [0.0893854748603352, "#1910d8"], [0.1787709497206704, "#3c19f0"], [0.2681564245810056, "#6b1cfb"], [0.3575418994413408, "#981cfd"], [0.44692737430167595, "#bf1cfd"], [0.5363128491620112, "#dd2bfd"], [0.6256983240223464, "#f246fe"], [0.7150837988826816, "#fc67fd"], [0.8044692737430168, "#fe88fc"], [0.8938547486033519, "#fea5fd"], [0.9832402234636871, "#febefe"], [1.0, "#fec3fe"]], "sequentialminus": [[0.0, "#0508b8"], [0.0893854748603352, "#1910d8"], [0.1787709497206704, "#3c19f0"], [0.2681564245810056, "#6b1cfb"], [0.3575418994413408, "#981cfd"], [0.44692737430167595, "#bf1cfd"], [0.5363128491620112, "#dd2bfd"], [0.6256983240223464, "#f246fe"], [0.7150837988826816, "#fc67fd"], [0.8044692737430168, "#fe88fc"], [0.8938547486033519, "#fea5fd"], [0.9832402234636871, "#febefe"], [1.0, "#fec3fe"]], "diverging": [[0, "#8e0152"], [0.1, "#c51b7d"], [0.2, "#de77ae"], [0.3, "#f1b6da"], [0.4, "#fde0ef"], [0.5, "#f7f7f7"], [0.6, "#e6f5d0"], [0.7, "#b8e186"], [0.8, "#7fbc41"], [0.9, "#4d9221"], [1, "#276419"]]}, "xaxis": {"gridcolor": "white", "linecolor": "white", "ticks": "", "zerolinecolor": "white", "automargin": true, "zerolinewidth": 2}, "yaxis": {"gridcolor": "white", "linecolor": "white", "ticks": "", "zerolinecolor": "white", "automargin": true, "zerolinewidth": 2}, "scene": {"xaxis": {"backgroundcolor": "#E5ECF6", "gridcolor": "white", "linecolor": "white", "showbackground": true, "ticks": "", "zerolinecolor": "white", "gridwidth": 2}, "yaxis": {"backgroundcolor": "#E5ECF6", "gridcolor": "white", "linecolor": "white", "showbackground": true, "ticks": "", "zerolinecolor": "white", "gridwidth": 2}, "zaxis": {"backgroundcolor": "#E5ECF6", "gridcolor": "white", "linecolor": "white", "showbackground": true, "ticks": "", "zerolinecolor": "white", "gridwidth": 2}}, "shapedefaults": {"fillcolor": "#506784", "line": {"width": 0}, "opacity": 0.4}, "annotationdefaults": {"arrowcolor": "#506784", "arrowhead": 0, "arrowwidth": 1}, "geo": {"bgcolor": "white", "landcolor": "#E5ECF6", "subunitcolor": "white", "showland": true, "showlakes": true, "lakecolor": "white"}, "title": {"x": 0.05}, "mapbox": {"style": "light"}}, "data": {"histogram2dcontour": [{"type": "histogram2dcontour", "colorbar": {"outlinewidth": 0, "ticks": ""}, "autocolorscale": true}], "choropleth": [{"type": "choropleth", "colorbar": {"outlinewidth": 0, "ticks": ""}}], "histogram2d": [{"type": "histogram2d", "colorbar": {"outlinewidth": 0, "ticks": ""}, "autocolorscale": true}], "heatmap": [{"type": "heatmap", "colorbar": {"outlinewidth": 0, "ticks": ""}, "autocolorscale": true}], "heatmapgl": [{"type": "heatmapgl", "colorbar": {"outlinewidth": 0, "ticks": ""}}], "contourcarpet": [{"type": "contourcarpet", "colorbar": {"outlinewidth": 0, "ticks": ""}}], "contour": [{"type": "contour", "colorbar": {"outlinewidth": 0, "ticks": ""}, "autocolorscale": true}], "surface": [{"type": "surface", "colorbar": {"outlinewidth": 0, "ticks": ""}}], "mesh3d": [{"type": "mesh3d", "colorbar": {"outlinewidth": 0, "ticks": ""}}], "scatter": [{"type": "scatter", "marker": {"colorbar": {"outlinewidth": 0, "ticks": ""}}}], "parcoords": [{"type": "parcoords", "line": {"colorbar": {"outlinewidth": 0, "ticks": ""}}}], "scatterpolargl": [{"type": "scatterpolargl", "marker": {"colorbar": 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\ No newline at end of file
diff --git a/plotly/package_data/templates/plotly_dark.json b/plotly/package_data/templates/plotly_dark.json
index de7038efbe2..f022b540e3f 100644
--- a/plotly/package_data/templates/plotly_dark.json
+++ b/plotly/package_data/templates/plotly_dark.json
@@ -1 +1 @@
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\ No newline at end of file
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\ No newline at end of file
diff --git a/plotly/package_data/templates/plotly_white.json b/plotly/package_data/templates/plotly_white.json
index 24175f501d5..bd434ba84bd 100644
--- a/plotly/package_data/templates/plotly_white.json
+++ b/plotly/package_data/templates/plotly_white.json
@@ -1 +1 @@
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[0.8044692737430168, "#fe88fc"], [0.8938547486033519, "#fea5fd"], [0.9832402234636871, "#febefe"], [1.0, "#fec3fe"]], "sequentialminus": [[0.0, "#0508b8"], [0.0893854748603352, "#1910d8"], [0.1787709497206704, "#3c19f0"], [0.2681564245810056, "#6b1cfb"], [0.3575418994413408, "#981cfd"], [0.44692737430167595, "#bf1cfd"], [0.5363128491620112, "#dd2bfd"], [0.6256983240223464, "#f246fe"], [0.7150837988826816, "#fc67fd"], [0.8044692737430168, "#fe88fc"], [0.8938547486033519, "#fea5fd"], [0.9832402234636871, "#febefe"], [1.0, "#fec3fe"]], "diverging": [[0, "#8e0152"], [0.1, "#c51b7d"], [0.2, "#de77ae"], [0.3, "#f1b6da"], [0.4, "#fde0ef"], [0.5, "#f7f7f7"], [0.6, "#e6f5d0"], [0.7, "#b8e186"], [0.8, "#7fbc41"], [0.9, "#4d9221"], [1, "#276419"]]}, "xaxis": {"gridcolor": "#EBF0F8", "linecolor": "#EBF0F8", "ticks": "", "zerolinecolor": "#EBF0F8", "automargin": true, "zerolinewidth": 2}, "yaxis": {"gridcolor": "#EBF0F8", "linecolor": "#EBF0F8", "ticks": "", "zerolinecolor": "#EBF0F8", 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\ No newline at end of file
+{"layout": {"colorway": ["#636efa", "#EF553B", "#00cc96", "#ab63fa", "#19d3f3", "#e763fa", "#FECB52", "#FFA15A", "#FF6692", "#B6E880"], "font": {"color": "#2a3f5f"}, "hovermode": "closest", "hoverlabel": {"align": "left"}, "legend": {"itemsizing": "constant"}, "paper_bgcolor": "white", "plot_bgcolor": "white", "polar": {"bgcolor": "white", "angularaxis": {"gridcolor": "#EBF0F8", "linecolor": "#EBF0F8", "ticks": ""}, "radialaxis": {"gridcolor": "#EBF0F8", "linecolor": "#EBF0F8", "ticks": ""}}, "ternary": {"bgcolor": "white", "aaxis": {"gridcolor": "#DFE8F3", "linecolor": "#A2B1C6", "ticks": ""}, "baxis": {"gridcolor": "#DFE8F3", "linecolor": "#A2B1C6", "ticks": ""}, "caxis": {"gridcolor": "#DFE8F3", "linecolor": "#A2B1C6", "ticks": ""}}, "colorscale": {"sequential": [[0.0, "#0508b8"], [0.0893854748603352, "#1910d8"], [0.1787709497206704, "#3c19f0"], [0.2681564245810056, "#6b1cfb"], [0.3575418994413408, "#981cfd"], [0.44692737430167595, "#bf1cfd"], [0.5363128491620112, "#dd2bfd"], 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\ No newline at end of file
diff --git a/plotly/package_data/templates/seaborn.json b/plotly/package_data/templates/seaborn.json
index 612e189a7ba..6c285539030 100644
--- a/plotly/package_data/templates/seaborn.json
+++ b/plotly/package_data/templates/seaborn.json
@@ -1 +1 @@
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"ticks": "outside", "tickwidth": 2}}}], "parcoords": [{"type": "parcoords", "line": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "scatterpolargl": [{"type": "scatterpolargl", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "bar": [{"marker": {"line": {"color": "rgb(234,234,242)", "width": 0.5}}, "type": "bar"}], "scattergeo": [{"type": "scattergeo", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "scatterpolar": [{"type": "scatterpolar", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "histogram": [{"type": "histogram", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "scattergl": [{"type": "scattergl", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "scatter3d": [{"type": "scatter3d", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "scattermapbox": [{"type": "scattermapbox", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "scatterternary": [{"type": "scatterternary", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "scattercarpet": [{"type": "scattercarpet", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "carpet": [{"aaxis": {"endlinecolor": "rgb(36,36,36)", "gridcolor": "white", "linecolor": "white", "minorgridcolor": "white", "startlinecolor": "rgb(36,36,36)"}, "baxis": {"endlinecolor": "rgb(36,36,36)", "gridcolor": "white", "linecolor": "white", "minorgridcolor": "white", "startlinecolor": "rgb(36,36,36)"}, "type": "carpet"}], "table": [{"cells": {"fill": {"color": "rgb(231,231,240)"}, "line": {"color": "white"}}, "header": {"fill": {"color": "rgb(183,183,191)"}, "line": {"color": "white"}}, "type": "table"}], "barpolar": [{"marker": {"line": {"color": "rgb(234,234,242)", "width": 0.5}}, "type": "barpolar"}]}}
\ No newline at end of file
+{"layout": {"colorway": ["rgb(76,114,176)", "rgb(221,132,82)", "rgb(85,168,104)", "rgb(196,78,82)", "rgb(129,114,179)", "rgb(147,120,96)", "rgb(218,139,195)", "rgb(140,140,140)", "rgb(204,185,116)", "rgb(100,181,205)"], "font": {"color": "rgb(36,36,36)"}, "hovermode": "closest", "hoverlabel": {"align": "left"}, "legend": {"itemsizing": "constant"}, "paper_bgcolor": "white", "plot_bgcolor": "rgb(234,234,242)", "polar": {"bgcolor": "rgb(234,234,242)", "angularaxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "ticks": ""}, "radialaxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "ticks": ""}}, "ternary": {"bgcolor": "rgb(234,234,242)", "aaxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "ticks": ""}, "baxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "ticks": ""}, "caxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "ticks": ""}}, "colorscale": {"sequential": [[0.0, "rgb(2,4,25)"], [0.06274509803921569, "rgb(24,15,41)"], [0.12549019607843137, "rgb(47,23,57)"], [0.18823529411764706, "rgb(71,28,72)"], [0.25098039215686274, "rgb(97,30,82)"], [0.3137254901960784, "rgb(123,30,89)"], [0.3764705882352941, "rgb(150,27,91)"], [0.4392156862745098, "rgb(177,22,88)"], [0.5019607843137255, "rgb(203,26,79)"], [0.5647058823529412, "rgb(223,47,67)"], [0.6274509803921569, "rgb(236,76,61)"], [0.6901960784313725, "rgb(242,107,73)"], [0.7529411764705882, "rgb(244,135,95)"], [0.8156862745098039, "rgb(245,162,122)"], [0.8784313725490196, "rgb(246,188,153)"], [0.9411764705882353, "rgb(247,212,187)"], [1.0, "rgb(250,234,220)"]], "sequentialminus": [[0.0, "rgb(2,4,25)"], [0.06274509803921569, "rgb(24,15,41)"], [0.12549019607843137, "rgb(47,23,57)"], [0.18823529411764706, "rgb(71,28,72)"], [0.25098039215686274, "rgb(97,30,82)"], [0.3137254901960784, "rgb(123,30,89)"], [0.3764705882352941, "rgb(150,27,91)"], [0.4392156862745098, "rgb(177,22,88)"], [0.5019607843137255, "rgb(203,26,79)"], [0.5647058823529412, "rgb(223,47,67)"], [0.6274509803921569, "rgb(236,76,61)"], [0.6901960784313725, "rgb(242,107,73)"], [0.7529411764705882, "rgb(244,135,95)"], [0.8156862745098039, "rgb(245,162,122)"], [0.8784313725490196, "rgb(246,188,153)"], [0.9411764705882353, "rgb(247,212,187)"], [1.0, "rgb(250,234,220)"]]}, "xaxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "ticks": "", "zerolinecolor": "white", "automargin": true}, "yaxis": {"gridcolor": "white", "linecolor": "white", "showgrid": true, "ticks": "", "zerolinecolor": "white", "automargin": true}, "scene": {"xaxis": {"backgroundcolor": "rgb(234,234,242)", "gridcolor": "white", "linecolor": "white", "showbackground": true, "showgrid": true, "ticks": "", "zerolinecolor": "white", "gridwidth": 2}, "yaxis": {"backgroundcolor": "rgb(234,234,242)", "gridcolor": "white", "linecolor": "white", "showbackground": true, "showgrid": true, "ticks": "", "zerolinecolor": "white", "gridwidth": 2}, "zaxis": {"backgroundcolor": "rgb(234,234,242)", "gridcolor": "white", "linecolor": "white", "showbackground": true, "showgrid": true, "ticks": "", "zerolinecolor": "white", "gridwidth": 2}}, "shapedefaults": {"fillcolor": "rgb(67,103,167)", "line": {"width": 0}, "opacity": 0.5}, "annotationdefaults": {"arrowcolor": "rgb(67,103,167)"}, "geo": {"bgcolor": "white", "landcolor": "rgb(234,234,242)", "subunitcolor": "white", "showland": true, "showlakes": true, "lakecolor": "white"}}, "data": {"histogram2dcontour": [{"type": "histogram2dcontour", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}, "autocolorscale": true}], "choropleth": [{"type": "choropleth", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}], "histogram2d": [{"type": "histogram2d", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}, "autocolorscale": true}], "heatmap": [{"type": "heatmap", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}, "autocolorscale": true}], "heatmapgl": [{"type": "heatmapgl", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}], "contourcarpet": [{"type": "contourcarpet", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}], "contour": [{"type": "contour", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}, "autocolorscale": true}], "surface": [{"type": "surface", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}], "mesh3d": [{"type": "mesh3d", "colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}], "scatter": [{"type": "scatter", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "parcoords": [{"type": "parcoords", "line": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "scatterpolargl": [{"type": "scatterpolargl", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "bar": [{"marker": {"line": {"color": "rgb(234,234,242)", "width": 0.5}}, "type": "bar"}], "scattergeo": [{"type": "scattergeo", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "scatterpolar": [{"type": "scatterpolar", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "histogram": [{"type": "histogram", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "scattergl": [{"type": "scattergl", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "scatter3d": [{"type": "scatter3d", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "scattermapbox": [{"type": "scattermapbox", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "scatterternary": [{"type": "scatterternary", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "scattercarpet": [{"type": "scattercarpet", "marker": {"colorbar": {"outlinewidth": 0, "tickcolor": "rgb(36,36,36)", "ticklen": 8, "ticks": "outside", "tickwidth": 2}}}], "carpet": [{"aaxis": {"endlinecolor": "rgb(36,36,36)", "gridcolor": "white", "linecolor": "white", "minorgridcolor": "white", "startlinecolor": "rgb(36,36,36)"}, "baxis": {"endlinecolor": "rgb(36,36,36)", "gridcolor": "white", "linecolor": "white", "minorgridcolor": "white", "startlinecolor": "rgb(36,36,36)"}, "type": "carpet"}], "table": [{"cells": {"fill": {"color": "rgb(231,231,240)"}, "line": {"color": "white"}}, "header": {"fill": {"color": "rgb(183,183,191)"}, "line": {"color": "white"}}, "type": "table"}], "barpolar": [{"marker": {"line": {"color": "rgb(234,234,242)", "width": 0.5}}, "type": "barpolar"}]}}
\ No newline at end of file
diff --git a/plotlywidget/static/index.js b/plotlywidget/static/index.js
index a218edb4491..0240b46acab 100644
--- a/plotlywidget/static/index.js
+++ b/plotlywidget/static/index.js
@@ -12649,7 +12649,7 @@ module.exports = function identity(d) { return d; };
 /* 19 */
 /***/ (function(module, exports) {
 
-module.exports = {"name":"plotlywidget","version":"0.8.0","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":"1.47.1","@jupyter-widgets/base":"^1.0.0","lodash":"^4.17.4"},"jupyterlab":{"extension":"src/jupyterlab-plugin"}}
+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":"1.47.1","@jupyter-widgets/base":"^1.0.0","lodash":"^4.17.4"},"jupyterlab":{"extension":"src/jupyterlab-plugin"}}
 
 /***/ }),
 /* 20 */
diff --git a/templategen/utils/__init__.py b/templategen/utils/__init__.py
index 5988e35e572..717c5ec436c 100644
--- a/templategen/utils/__init__.py
+++ b/templategen/utils/__init__.py
@@ -72,6 +72,12 @@ def initialize_template(annotation_defaults,
     # hovermode
     template.layout.hovermode = 'closest'
 
+    # right-align hoverlabels
+    template.layout.hoverlabel.align = 'left'
+
+    # fix size of legend items
+    template.layout.legend.itemsizing = 'constant'
+
     # Set background colors
     template.layout.paper_bgcolor = paper_clr
     template.layout.plot_bgcolor = panel_background_clr