diff --git a/build/webpack.analyser.js b/build/webpack.analyser.js
index 5e997ca..41c9dbf 100644
--- a/build/webpack.analyser.js
+++ b/build/webpack.analyser.js
@@ -1,5 +1,5 @@
-const BundleAnalyzerPlugin = require('webpack-bundle-analyzer')
-  .BundleAnalyzerPlugin
+const BundleAnalyzerPlugin =
+  require('webpack-bundle-analyzer').BundleAnalyzerPlugin
 
 exports = require('./webpack.release')
 
diff --git a/build/webpack.base.js b/build/webpack.base.js
index 296c67d..07e8c22 100644
--- a/build/webpack.base.js
+++ b/build/webpack.base.js
@@ -36,7 +36,9 @@ module.exports = {
     symlinks: false,
   },
   devServer: {
-    contentBase: './test',
+    static: {
+      directory: path.join(__dirname, '../test'),
+    },
     port: 3000,
   },
   output: {
@@ -66,16 +68,11 @@ module.exports = {
       },
       {
         test: /\.scss$/,
-        loaders: [
-          cssMinifierLoader,
-          'css-loader',
-          postcssLoader,
-          'sass-loader',
-        ],
+        use: [cssMinifierLoader, 'css-loader', postcssLoader, 'sass-loader'],
       },
       {
         test: /\.css$/,
-        loaders: [cssMinifierLoader, 'css-loader', postcssLoader],
+        use: [cssMinifierLoader, 'css-loader', postcssLoader],
       },
       // https://github.com/wycats/handlebars.js/issues/1134
       {
diff --git a/package.json b/package.json
index 0e512c4..0ad24e6 100644
--- a/package.json
+++ b/package.json
@@ -56,25 +56,25 @@
     "jasmine-jquery": "^2.1.1",
     "jquery": "^3.4.1",
     "js-beautify": "^1.10.3",
-    "karma": "^4.4.1",
+    "karma": "^6.4.0",
     "karma-chrome-launcher": "^3.1.0",
     "karma-coverage-istanbul-reporter": "^2.1.1",
     "karma-jasmine": "^1.1.2",
     "karma-jquery": "^0.2.4",
     "karma-sourcemap-loader": "^0.3.7",
-    "karma-webpack": "^4.0.2",
+    "karma-webpack": "^5.0.0",
     "licia": "^1.30.0",
     "luna-console": "^0.2.1",
     "luna-notification": "^0.1.3",
     "luna-object-viewer": "^0.2.0",
-    "node-sass": "^4.13.1",
+    "node-sass": "^7.0.1",
     "postcss-clean": "^1.1.0",
     "postcss-loader": "^3.0.0",
     "postcss-prefixer": "^2.1.2",
-    "sass-loader": "^8.0.2",
-    "webpack": "^4.41.6",
+    "sass-loader": "^13.0.2",
+    "webpack": "^5.73.0",
     "webpack-bundle-analyzer": "^3.6.0",
-    "webpack-cli": "^3.3.11",
-    "webpack-dev-server": "^3.10.3"
+    "webpack-cli": "^4.10.0",
+    "webpack-dev-server": "^4.9.3"
   }
 }