diff --git a/CHANGELOG.md b/CHANGELOG.md
index 11e11aa06cf..96a8262d980 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,38 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [4.1.0] - 2019-08-06
+
+### Updated
+ - Updated Plotly.js to version 1.49.1. See the
+ [plotly.js CHANGELOG](https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md#1491----2019-07-31)
+ for more information.
+ - Bars in the figures produced by the `create_gantt` figure factory may now be hidden by clicking on the legend ([#1665](https://github.com/plotly/plotly.py/pull/1665)). Special thanks to [@csabaszan](https://github.com/csabaszan) for this contribution!
+ - Improved performance when serializing figures containing large numpy arrays ([#1690](https://github.com/plotly/plotly.py/pull/1690)). Special thanks to [@miriad](https://github.com/miriad) for this contribution!
+ 
+### Added
+- Added new renderers for displaying figures from within the Databricks and CoCalc notebook services ([#1703](https://github.com/plotly/plotly.py/pull/1703))
+- Added `indicator` traces ([plotly/plotly.js#3978](https://github.com/plotly/plotly.js/pull/3978))
+- Added `choroplethmapbox` traces ([plotly/plotly.js#3988](https://github.com/plotly/plotly.js/pull/3988))
+- Added `densitymapbox` traces ([plotly/plotly.js#3993](https://github.com/plotly/plotly.js/pull/3993))
+- Added new mapbox `style` values: `open-street-map`, `carto-positron`, `carto-darkmatter`,
+  `stamen-terrain`, `stamen-toner`, `stamen-watercolor` and `white-bg`
+  that do not require a Mapbox access token ([plotly/plotly.js#3987](https://github.com/plotly/plotly.js/pull/3987), [plotly/plotly.js#4068](https://github.com/plotly/plotly.js/pull/4068))
+- Added support for `sourcetype` value `raster` and `image` and `type` `raster`
+  for mapbox layout layers ([plotly/plotly.js#4006](https://github.com/plotly/plotly.js/pull/4006))
+- Added `below` attribute to `scattermapbox` traces ([plotly/plotly.js#4058](https://github.com/plotly/plotly.js/pull/4058))
+- Added support for `below: 'traces'` in mapbox layout layers ([plotly/plotly.js#4058](https://github.com/plotly/plotly.js/pull/4058))
+- Added `sourceattribution` attribute to mapbox layout layers ([plotly/plotly.js#4069](https://github.com/plotly/plotly.js/pull/4069))
+- Added `labelangle` and `labelside` attributes to `parcoords` traces ([plotly/plotly.js#3966](https://github.com/plotly/plotly.js/pull/3966))
+- Added `doubleClickDelay` config option ([plotly/plotly.js#3991](https://github.com/plotly/plotly.js/pull/3991))
+- Added `showEditInChartStudio` config option ([plotly/plotly.js#4061](https://github.com/plotly/plotly.js/pull/4061))
+
+### Fixed
+ - Fixed incorrect facet row ordering in figures generated by plotly.express functions ([plotly/plotly_express#129](https://github.com/plotly/plotly_express/issues/129)) 
+ - Fixed "The truth value of an array with more than one element is ambiguous" error when specifying subplot titles as numpy array of strings ([#1685](https://github.com/plotly/plotly.py/pull/1685)). Special thanks to [@MrQubo](https://github.com/MrQubo) for this contribution!
+ - The `line_3d` plotly express function was not visible by default when importing `*` from `plotly.express` ([#1667](https://github.com/plotly/plotly.py/pull/1667/files))
+ 
+ 
 ## [4.0.0] - 2019-07-16
 
 This is a major release that includes many new features, and a few breaking changes. See the [version 4 announcement](https://community.plot.ly/t/introducing-plotly-py-4-0-0rc1/25639) for a summary of the important changes.
diff --git a/README.md b/README.md
index 580a2326d8f..b5f9274e471 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==4.0.0
+pip install plotly==4.1.0
 ```
 
 or conda.
 ```
-conda install -c plotly plotly==4.0.0
+conda install -c plotly plotly==4.1.0
 ```
 
 ### Jupyter Notebook Support
@@ -126,10 +126,10 @@ set NODE_OPTIONS=--max-old-space-size=4096
 jupyter labextension install @jupyter-widgets/jupyterlab-manager@1.0 --no-build
 
 # FigureWidget support
-jupyter labextension install plotlywidget@1.0.0 --no-build
+jupyter labextension install plotlywidget@1.1.0 --no-build
 
 # and jupyterlab renderer support
-jupyter labextension install jupyterlab-plotly@1.0.0 --no-build
+jupyter labextension install jupyterlab-plotly@1.1.0 --no-build
 
 # JupyterLab chart editor support (optional)
 jupyter labextension install jupyterlab-chart-editor@1.2 --no-build
diff --git a/packages/javascript/jupyterlab-plotly/package-lock.json b/packages/javascript/jupyterlab-plotly/package-lock.json
index 8339a63731e..43298c597d8 100644
--- a/packages/javascript/jupyterlab-plotly/package-lock.json
+++ b/packages/javascript/jupyterlab-plotly/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "jupyterlab-plotly",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/packages/javascript/jupyterlab-plotly/package.json b/packages/javascript/jupyterlab-plotly/package.json
index 07267f52864..86ff503fc5c 100644
--- a/packages/javascript/jupyterlab-plotly/package.json
+++ b/packages/javascript/jupyterlab-plotly/package.json
@@ -1,6 +1,6 @@
 {
   "name": "jupyterlab-plotly",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "description": "The plotly JupyterLab extension",
   "author": "The plotly.py team",
   "license": "MIT",
diff --git a/packages/javascript/plotlywidget/package-lock.json b/packages/javascript/plotlywidget/package-lock.json
index cfff10f2db0..18893e6d22f 100644
--- a/packages/javascript/plotlywidget/package-lock.json
+++ b/packages/javascript/plotlywidget/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "plotlywidget",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/packages/javascript/plotlywidget/package.json b/packages/javascript/plotlywidget/package.json
index 269820e3124..2ee22c55e6b 100644
--- a/packages/javascript/plotlywidget/package.json
+++ b/packages/javascript/plotlywidget/package.json
@@ -1,6 +1,6 @@
 {
   "name": "plotlywidget",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "description": "The plotly JupyterLab extension",
   "author": "The plotly.py team",
   "license": "MIT",
diff --git a/packages/python/plotly/plotly/_widget_version.py b/packages/python/plotly/plotly/_widget_version.py
index b7943be5c9d..593e93e6fd6 100644
--- a/packages/python/plotly/plotly/_widget_version.py
+++ b/packages/python/plotly/plotly/_widget_version.py
@@ -2,4 +2,4 @@
 # for automated dev builds
 #
 # It is edited by hand prior to official releases
-__frontend_version__ = "^1.0.0"
+__frontend_version__ = "^1.1.0"
diff --git a/packages/python/plotly/plotly/express/__init__.py b/packages/python/plotly/plotly/express/__init__.py
index 21848cb4283..19aa4bb3e51 100644
--- a/packages/python/plotly/plotly/express/__init__.py
+++ b/packages/python/plotly/plotly/express/__init__.py
@@ -3,8 +3,6 @@
 data exploration and figure generation. See the gallery at https://plotly.github.io/plotly_express
 """
 
-__version__ = "0.3.0"
-
 from ._chart_types import (  # noqa: F401
     scatter,
     scatter_3d,
diff --git a/packages/python/plotly/plotly/express/_core.py b/packages/python/plotly/plotly/express/_core.py
index c5a46b561d3..69b3c9ac382 100644
--- a/packages/python/plotly/plotly/express/_core.py
+++ b/packages/python/plotly/plotly/express/_core.py
@@ -352,12 +352,18 @@ def configure_cartesian_marginal_axes(args, fig, orders):
 
     # Add axis titles to non-marginal subplots
     y_title = get_decorated_label(args, args["y"], "y")
-    for row in range(1, nrows):
-        fig.update_yaxes(title_text=y_title, row=row, col=1)
+    if args["marginal_x"]:
+        fig.update_yaxes(title_text=y_title, row=1, col=1)
+    else:
+        for row in range(1, nrows + 1):
+            fig.update_yaxes(title_text=y_title, row=row, col=1)
 
     x_title = get_decorated_label(args, args["x"], "x")
-    for col in range(1, ncols):
-        fig.update_xaxes(title_text=x_title, row=1, col=col)
+    if args["marginal_y"]:
+        fig.update_xaxes(title_text=x_title, row=1, col=1)
+    else:
+        for col in range(1, ncols + 1):
+            fig.update_xaxes(title_text=x_title, row=1, col=col)
 
     # Configure axis type across all x-axes
     if "log_x" in args and args["log_x"]:
@@ -958,7 +964,7 @@ def make_figure(args, constructor, trace_patch={}, layout_patch={}):
                     row = m.val_map[val]
                     trace._subplot_row_val = val
                 else:
-                    if trace_spec.marginal == "x":
+                    if has_marginal_x and trace_spec.marginal != "x":
                         row = 2
                     else:
                         row = 1
@@ -1039,7 +1045,11 @@ def make_figure(args, constructor, trace_patch={}, layout_patch={}):
                 continue
 
             _set_trace_grid_reference(
-                trace, fig.layout, fig._grid_ref, trace._subplot_row, trace._subplot_col
+                trace,
+                fig.layout,
+                fig._grid_ref,
+                nrows - trace._subplot_row + 1,
+                trace._subplot_col,
             )
 
     # Add traces, layout and frames to figure
@@ -1063,7 +1073,7 @@ def init_figure(
     row_titles = [None] * nrows
     for frame in frame_list:
         for trace in frame["data"]:
-            row0 = nrows - trace._subplot_row
+            row0 = trace._subplot_row - 1
             col0 = trace._subplot_col - 1
 
             if isinstance(trace, go.Splom):
@@ -1122,7 +1132,7 @@ def init_figure(
         specs=specs,
         shared_xaxes="all",
         shared_yaxes="all",
-        row_titles=row_titles,
+        row_titles=list(reversed(row_titles)),
         column_titles=column_titles,
         horizontal_spacing=horizontal_spacing,
         vertical_spacing=vertical_spacing,
diff --git a/packages/python/plotly/plotly/subplots.py b/packages/python/plotly/plotly/subplots.py
index 6af054941d4..bd869ad249f 100644
--- a/packages/python/plotly/plotly/subplots.py
+++ b/packages/python/plotly/plotly/subplots.py
@@ -753,12 +753,7 @@ def _checks(item, defaults):
 
     if row_titles:
         domains_list = []
-        if row_dir < 0:
-            rows_iter = range(rows - 1, -1, -1)
-        else:
-            rows_iter = range(rows)
-
-        for r in rows_iter:
+        for r in range(rows):
             domain_pair = domains_grid[r][-1]
             if domain_pair:
                 domains_list.extend(domain_pair)
diff --git a/packages/python/plotly/plotlywidget/static/index.js b/packages/python/plotly/plotlywidget/static/index.js
index 43faa3e37cc..ceea30dfc82 100644
--- a/packages/python/plotly/plotlywidget/static/index.js
+++ b/packages/python/plotly/plotlywidget/static/index.js
@@ -12569,7 +12569,7 @@ module.exports = function identity(d) { return d; };
 /* 19 */
 /***/ (function(module, exports) {
 
-module.exports = {"name":"plotlywidget","version":"1.0.0","description":"The plotly JupyterLab extension","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","style/*.*"],"scripts":{"build":"npm run build:src","build:src":"rimraf dist && tsc","clean":"rimraf dist/ && rimraf  ../../python/plotly/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","typescript":"~3.1.1"},"dependencies":{"plotly.js":"^1.49.1","@jupyter-widgets/base":"^2.0.0","lodash":"^4.17.4"},"jupyterlab":{"extension":"src/jupyterlab-plugin.js"}}
+module.exports = {"name":"plotlywidget","version":"1.1.0","description":"The plotly JupyterLab extension","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","style/*.*"],"scripts":{"build":"npm run build:src","build:src":"rimraf dist && tsc","clean":"rimraf dist/ && rimraf  ../../python/plotly/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","typescript":"~3.1.1"},"dependencies":{"plotly.js":"^1.49.1","@jupyter-widgets/base":"^2.0.0","lodash":"^4.17.4"},"jupyterlab":{"extension":"src/jupyterlab-plugin.js"}}
 
 /***/ }),
 /* 20 */