diff --git a/packages/blink-provider/package.json b/packages/blink-provider/package.json
index bc4fd2d6..e22188cc 100644
--- a/packages/blink-provider/package.json
+++ b/packages/blink-provider/package.json
@@ -9,7 +9,7 @@
   },
   "scripts": {
     "build": "webpack-cli",
-    "build-prod": "webpack-cli -p"
+    "build-prod": "webpack-cli"
   },
   "version": "0.8.15",
   "main": "dist/blink.js",
diff --git a/packages/generic-http-provider/package.json b/packages/generic-http-provider/package.json
index 92efd149..177acc3d 100644
--- a/packages/generic-http-provider/package.json
+++ b/packages/generic-http-provider/package.json
@@ -10,11 +10,11 @@
   },
   "scripts": {
     "build": "webpack-cli",
-    "build-prod": "webpack-cli -p"
+    "build-prod": "webpack-cli"
   },
   "version": "0.8.15",
   "devDependencies": {
-    "webpack-cli": "^3.3.5"
+    "webpack-cli": "^4.10.0"
   },
   "files": [
     "dist/*"
diff --git a/packages/mux-provider/package.json b/packages/mux-provider/package.json
index c6e35dd6..ce61cca2 100644
--- a/packages/mux-provider/package.json
+++ b/packages/mux-provider/package.json
@@ -10,11 +10,11 @@
     "debug": "^4.1.1"
   },
   "devDependencies": {
-    "webpack-cli": "^3.3.5"
+    "webpack-cli": "^4.10.0"
   },
   "scripts": {
     "build": "webpack-cli",
-    "build-prod": "webpack-cli -p"
+    "build-prod": "webpack-cli"
   },
   "version": "0.8.15",
   "files": [
diff --git a/packages/package.json b/packages/package.json
index e4e950cc..27b2ecca 100644
--- a/packages/package.json
+++ b/packages/package.json
@@ -12,11 +12,11 @@
     "@babel/preset-env": "^7.4.2",
     "babel-loader": "^8.0.5",
     "lerna": "^3.16.2",
-    "ts-loader": "^5.3.3",
+    "ts-loader": "^9.4.1",
     "typescript": "^4.0.3",
-    "uglifyjs-webpack-plugin": "^2.1.2",
-    "webpack": "^4.29.6",
-    "webpack-cli": "^3.3.0",
+    "terser-webpack-plugin": "^5.3.6",
+    "webpack": "^5.74.0",
+    "webpack-cli": "^4.10.0",
     "webpack-merge": "^4.2.1"
   },
   "dependencies": {
diff --git a/packages/webio/package.json b/packages/webio/package.json
index af5168ec..192c576c 100644
--- a/packages/webio/package.json
+++ b/packages/webio/package.json
@@ -18,11 +18,11 @@
   },
   "scripts": {
     "build": "tsc -p . && webpack",
-    "build-prod": "npm run build && webpack -p"
+    "build-prod": "npm run build && webpack"
   },
   "devDependencies": {
     "typescript": "^4.4.2",
-    "webpack": "^4.35.3"
+    "webpack": "^5.74.0"
   },
   "gitHead": "a17bcee97d64897d0e9b429a8551f19eedc47091"
 }
diff --git a/packages/webpack.config.js b/packages/webpack.config.js
index f7baed9a..29bde9b1 100644
--- a/packages/webpack.config.js
+++ b/packages/webpack.config.js
@@ -1,6 +1,6 @@
 const path = require('path');
 const webpack = require("webpack");
-const UglifyJSPlugin = require("uglifyjs-webpack-plugin");
+const TerserPlugin = require("terser-webpack-plugin");
 
 module.exports = {
 
@@ -8,7 +8,8 @@ module.exports = {
   devtool: "cheap-module-source-map",
 
   optimization: {
-    minimizer: [new UglifyJSPlugin()],
+    minimize: true,
+    minimizer: [new TerserPlugin()],
   },
 
   // entry: {
@@ -34,9 +35,7 @@ module.exports = {
   // is NodeJS. Nevertheless, Webpack gets confused because it doesn't know
   // anything about the (node-builtin) module fs, so we tell it to just ignore
   // all references to it.
-  node: {
-    "fs": "empty",
-  },
+  resolve: { fallback: { fs: false } },
 
   module: {
     rules: [