diff --git a/CHANGES.md b/CHANGES.md
index c9f92555..52f707d3 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -5,10 +5,13 @@
 - Node.js 8 is no longer supported; Node.js 10.13.0 is now the minimum required version, as per many of nwb's dependencies.
 - Removed support for deprecated `babel.stage` and `webpack.uglify` config.
 - Removed default polyfills for `Promise`, `fetch()` and `Object.assign()` and deprecated `polyfill` config.
-  - If you need to support older browsers, you will need to provide the necessary polyfills yourself.
+  - If you need to support older browsers, you will now need to provide the necessary polyfills yourself in your app.
   - The [react-app-polyfill](https://github.com/facebook/create-react-app/tree/master/packages/react-app-polyfill#react-app-polyfill) module provides polyfills for IE 9-11, and for stable language features - its instructions also work for apps using nwb.
 - Deprecated using a string for [`webpack.autoprefixer` config](https://github.com/insin/nwb/blob/master/docs/Configuration.md#autoprefixer-object) to configure supported browsers - this will no longer do anything and should be moved to the new [`browsers` config](https://github.com/insin/nwb/blob/master/docs/Configuration.md#browsers-string--arraystring--object).
 - Default browser configuration for Autoprefixer when building an app has changed from [`>1%, last 4 versions, Firefox ESR, not ie < 9`](https://browserl.ist/?q=%3E1%25%2C+last+4+versions%2C+Firefox+ESR%2C+not+ie+%3C+9) to [`>0.2%, not dead, not op_mini all`](https://browserl.ist/?q=%3E0.2%25%2C+not+dead%2C+not+op_mini+all).
+- copy-webpack-plugin v6.0.0 [has breaking changes to its options](https://github.com/webpack-contrib/copy-webpack-plugin/blob/master/CHANGELOG.md#600-2020-05-15) which you should read if you've configured the [`webpack.copy` option](https://github.com/insin/nwb/blob/master/docs/Configuration.md#copy-array--object).
+
+  In particular, the `ignore` option in a copy pattern must now be put inside the new `globOptions` option.
 - file-loader v6.0.0 [changed its default hashing algorithm](https://github.com/webpack-contrib/file-loader/blob/master/CHANGELOG.md#600-2020-03-17).
 
 ## Added
@@ -22,9 +25,10 @@
 ## Dependencies
 
 - chalk: v3.0.0 → [v4.0.0](https://github.com/chalk/chalk/releases/tag/v4.0.0)
+- copy-webpack-plugin: v5.1.1 → [v6.0.1](https://github.com/webpack-contrib/copy-webpack-plugin/blob/master/CHANGELOG.md#601-2020-05-16)
 - file-loader: v4.3.0 → [v6.0.0](https://github.com/webpack-contrib/file-loader/blob/master/CHANGELOG.md#600-2020-03-17)
 - fs-extra: v8.1.0 → [v9.0.0](https://github.com/jprichardson/node-fs-extra/blob/master/CHANGELOG.md#900--2020-03-19)
-- karma: v4.4.1 → [v5.0.5](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md#505-2020-05-07)
+- karma: v4.4.1 → [v5.0.7](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md#507-2020-05-16)
 - karma-mocha: v1.3.0 → [v2.0.1](https://github.com/karma-runner/karma-mocha/blob/master/CHANGELOG.md#201-2020-04-29)
 - terser-webpack-plugin v2.3.6 → [v3.0.1](https://github.com/webpack-contrib/terser-webpack-plugin/blob/master/CHANGELOG.md#301-2020-05-06)
 - url-loader: v2.3.0→ [v4.1.0](https://github.com/webpack-contrib/url-loader/blob/master/CHANGELOG.md)
diff --git a/docs/Features.md b/docs/Features.md
index 7ce7b52d..1524ec54 100644
--- a/docs/Features.md
+++ b/docs/Features.md
@@ -1,7 +1,7 @@
 ## Features
 
 - **A toolkit, not a boilerplate.**
-- Uses [Webpack 4](https://webpack.js.org/), [Babel 7](https://babeljs.io/) and [Karma 4](https://karma-runner.github.io/).
+- Uses [Webpack 4](https://webpack.js.org/), [Babel 7](https://babeljs.io/) and [Karma 5](https://karma-runner.github.io/).
 - Provides tooling for [React](https://facebook.github.io/react/) apps and components, [Preact](https://preactjs.com/) apps, [Inferno](https://infernojs.org/) apps, and vanilla JS web apps and npm modules.
 - Use modern JavaScript features, and JSX.
 - Use proposed JavaScript features now.
diff --git a/package.json b/package.json
index 8f8f1ede..1025558d 100644
--- a/package.json
+++ b/package.json
@@ -67,7 +67,7 @@
     "babel-preset-proposals": "0.3.0",
     "react-refresh": "0.8.2",
 
-    "karma": "5.0.5",
+    "karma": "5.0.7",
     "karma-chrome-launcher": "3.1.0",
     "karma-coverage": "2.0.2",
     "karma-mocha": "2.0.1",
@@ -84,7 +84,7 @@
     "autoprefixer": "9.7.6",
     "babel-loader": "8.1.0",
     "case-sensitive-paths-webpack-plugin": "2.3.0",
-    "copy-webpack-plugin": "5.1.1",
+    "copy-webpack-plugin": "6.0.1",
     "css-loader": "3.5.3",
     "eventsource-polyfill": "0.9.6",
     "file-loader": "6.0.0",
diff --git a/src/appCommands.js b/src/appCommands.js
index c9388a4b..7d88b226 100644
--- a/src/appCommands.js
+++ b/src/appCommands.js
@@ -75,7 +75,11 @@ export function createBuildConfig(args: Object, extra: Object = {}) {
   }
 
   if (directoryExists('public')) {
-    config.plugins.copy = [{from: path.resolve('public'), to: dist, ignore: ['.gitkeep']}]
+    config.plugins.copy = [{
+      from: path.resolve('public'),
+      to: dist,
+      globOptions: {ignore: ['.gitkeep']}
+    }]
   }
 
   return merge(config, extra)
@@ -102,7 +106,11 @@ export function createServeConfig(args: Object, ...extra: Object[]) {
   }
 
   if (directoryExists('public')) {
-    config.plugins.copy = [{from: path.resolve('public'), to: dist, ignore: ['.gitkeep']}]
+    config.plugins.copy = [{
+      from: path.resolve('public'),
+      to: dist,
+      globOptions: {ignore: ['.gitkeep']}
+    }]
   }
 
   return merge(config, ...extra)
diff --git a/src/createWebpackConfig.js b/src/createWebpackConfig.js
index 1d6bb13c..e25eaf6b 100644
--- a/src/createWebpackConfig.js
+++ b/src/createWebpackConfig.js
@@ -562,7 +562,7 @@ export function createPlugins(
   if (buildConfig.copy || userConfig.copy) {
     const [patterns, options] = getCopyPluginArgs(buildConfig.copy, userConfig.copy)
     if (patterns.length > 0) {
-      plugins.push(new CopyPlugin(patterns, options))
+      plugins.push(new CopyPlugin({patterns, options}))
     }
   }