diff --git a/packages/d3-state-visualizer/examples/tree/package.json b/packages/d3-state-visualizer/examples/tree/package.json
index 98604111..96a2810e 100644
--- a/packages/d3-state-visualizer/examples/tree/package.json
+++ b/packages/d3-state-visualizer/examples/tree/package.json
@@ -2,9 +2,9 @@
   "name": "d3-state-visualizer-tree-example",
   "version": "0.0.0",
   "description": "Visualize your app state as a tree",
-  "main": "server.js",
+  "main": "index.js",
   "scripts": {
-    "start": "node server.js"
+    "start": "webpack-dev-server --open"
   },
   "repository": {
     "type": "git",
diff --git a/packages/d3-state-visualizer/examples/tree/server.js b/packages/d3-state-visualizer/examples/tree/server.js
deleted file mode 100644
index 3fced435..00000000
--- a/packages/d3-state-visualizer/examples/tree/server.js
+++ /dev/null
@@ -1,20 +0,0 @@
-var webpack = require('webpack');
-var WebpackDevServer = require('webpack-dev-server');
-var config = require('./webpack.config');
-
-new WebpackDevServer(webpack(config), {
-  publicPath: config.output.publicPath,
-  hot: true,
-  historyApiFallback: true,
-  stats: {
-    colors: true,
-  },
-}).listen(3000, 'localhost', function (err) {
-  if (err) {
-    // eslint-disable-next-line no-console
-    console.log(err);
-  }
-
-  // eslint-disable-next-line no-console
-  console.log('Listening at localhost:3000');
-});
diff --git a/packages/d3-state-visualizer/examples/tree/webpack.config.js b/packages/d3-state-visualizer/examples/tree/webpack.config.js
index ae7a6613..9c710375 100644
--- a/packages/d3-state-visualizer/examples/tree/webpack.config.js
+++ b/packages/d3-state-visualizer/examples/tree/webpack.config.js
@@ -28,4 +28,9 @@ module.exports = {
       },
     ],
   },
+  devServer: {
+    historyApiFallback: true,
+    hot: true,
+    port: 3000,
+  },
 };
diff --git a/packages/d3-state-visualizer/webpack.config.base.js b/packages/d3-state-visualizer/webpack.config.base.js
index 1c584203..f7ac921b 100644
--- a/packages/d3-state-visualizer/webpack.config.base.js
+++ b/packages/d3-state-visualizer/webpack.config.base.js
@@ -8,6 +8,7 @@ module.exports = {
   },
   output: {
     library: 'd3-state-visualizer',
+    libraryExport: 'default',
     libraryTarget: 'umd',
   },
   resolve: {
diff --git a/packages/d3tooltip/package.json b/packages/d3tooltip/package.json
index e503ea29..64723bcb 100644
--- a/packages/d3tooltip/package.json
+++ b/packages/d3tooltip/package.json
@@ -7,7 +7,7 @@
     "clean": "rimraf lib dist",
     "build": "babel src --out-dir lib",
     "build:umd": "webpack --progress --config webpack.config.umd.js",
-    "build:umd:min": "webpack --env.minimize --progress --config webpack.config.umd.js",
+    "build:umd:min": "webpack --env.production --progress --config webpack.config.umd.js",
     "version": "npm run build",
     "postversion": "git push && git push --tags && npm run clean",
     "prepare": "npm run clean && npm run build",
diff --git a/packages/d3tooltip/webpack.config.umd.js b/packages/d3tooltip/webpack.config.umd.js
index 6147c6fe..37a3178a 100644
--- a/packages/d3tooltip/webpack.config.umd.js
+++ b/packages/d3tooltip/webpack.config.umd.js
@@ -1,7 +1,7 @@
 const path = require('path');
 
 module.exports = (env = {}) => ({
-  mode: 'production',
+  mode: env.production ? 'production' : 'development',
   entry: {
     app: ['./src/index.js'],
   },
@@ -9,7 +9,7 @@ module.exports = (env = {}) => ({
     library: 'd3tooltip',
     libraryTarget: 'umd',
     path: path.resolve(__dirname, 'dist'),
-    filename: env.minimize ? 'd3tooltip.min.js' : 'd3tooltip.js',
+    filename: env.production ? 'd3tooltip.min.js' : 'd3tooltip.js',
   },
   module: {
     rules: [
@@ -20,10 +20,4 @@ module.exports = (env = {}) => ({
       },
     ],
   },
-  optimization: {
-    minimize: !!env.minimize,
-  },
-  performance: {
-    hints: false,
-  },
 });
diff --git a/packages/map2tree/package.json b/packages/map2tree/package.json
index 62570e1b..f0ba9664 100755
--- a/packages/map2tree/package.json
+++ b/packages/map2tree/package.json
@@ -7,7 +7,7 @@
     "clean": "rimraf lib dist",
     "build": "babel src --out-dir lib",
     "build:umd": "webpack --progress --config webpack.config.umd.js",
-    "build:umd:min": "webpack --env.minimize --progress --config webpack.config.umd.js",
+    "build:umd:min": "webpack --env.production --progress --config webpack.config.umd.js",
     "test": "jest",
     "prepare": "npm run build && npm run build:umd",
     "prepublishOnly": "npm run test && npm run clean && npm run build && npm run build:umd && npm run build:umd:min"
diff --git a/packages/map2tree/webpack.config.umd.js b/packages/map2tree/webpack.config.umd.js
index b137723e..fe011338 100644
--- a/packages/map2tree/webpack.config.umd.js
+++ b/packages/map2tree/webpack.config.umd.js
@@ -1,7 +1,7 @@
 const path = require('path');
 
 module.exports = (env = {}) => ({
-  mode: 'production',
+  mode: env.production ? 'production' : 'development',
   entry: {
     app: ['./src/index.js'],
   },
@@ -9,7 +9,7 @@ module.exports = (env = {}) => ({
     library: 'd3tooltip',
     libraryTarget: 'umd',
     path: path.resolve(__dirname, 'dist'),
-    filename: env.minimize ? 'map2tree.min.js' : 'map2tree.js',
+    filename: env.production ? 'map2tree.min.js' : 'map2tree.js',
   },
   module: {
     rules: [
@@ -20,10 +20,4 @@ module.exports = (env = {}) => ({
       },
     ],
   },
-  optimization: {
-    minimize: !!env.minimize,
-  },
-  performance: {
-    hints: false,
-  },
 });
diff --git a/packages/react-json-tree/examples/package.json b/packages/react-json-tree/examples/package.json
index 93969f07..c2be4f29 100644
--- a/packages/react-json-tree/examples/package.json
+++ b/packages/react-json-tree/examples/package.json
@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "description": "React-Json-Tree example",
   "scripts": {
-    "start": "node server.js",
+    "start": "webpack-dev-server --open",
     "stats": "NODE_ENV=production webpack --json > dist/stats.json"
   },
   "repository": {
diff --git a/packages/react-json-tree/examples/server.js b/packages/react-json-tree/examples/server.js
deleted file mode 100755
index 8bba29b1..00000000
--- a/packages/react-json-tree/examples/server.js
+++ /dev/null
@@ -1,16 +0,0 @@
-/* eslint-disable no-console */
-var webpack = require('webpack');
-var WebpackDevServer = require('webpack-dev-server');
-var config = require('./webpack.config');
-
-new WebpackDevServer(webpack(config), {
-  publicPath: config.output.publicPath,
-  hot: true,
-  historyApiFallback: true,
-}).listen(3000, 'localhost', function (err) {
-  if (err) {
-    console.log(err);
-  }
-
-  console.log('Listening at localhost:3000');
-});
diff --git a/packages/react-json-tree/examples/webpack.config.js b/packages/react-json-tree/examples/webpack.config.js
index 9b1bbb6d..9633b3d2 100755
--- a/packages/react-json-tree/examples/webpack.config.js
+++ b/packages/react-json-tree/examples/webpack.config.js
@@ -26,4 +26,9 @@ module.exports = {
       },
     ],
   },
+  devServer: {
+    historyApiFallback: true,
+    hot: true,
+    port: 3000,
+  },
 };
diff --git a/packages/redux-devtools-core/webpack.config.js b/packages/redux-devtools-core/webpack.config.js
index ac59640d..ed75e5f7 100644
--- a/packages/redux-devtools-core/webpack.config.js
+++ b/packages/redux-devtools-core/webpack.config.js
@@ -3,7 +3,7 @@ const webpack = require('webpack');
 const HtmlWebpackPlugin = require('html-webpack-plugin');
 
 module.exports = (env = {}) => ({
-  mode: 'development',
+  mode: env.development ? 'development' : 'production',
   entry: {
     app: './index.js',
   },