diff --git a/config/webpack/production.js b/config/webpack/production.js
index c829ff6f1..bceffaf5c 100644
--- a/config/webpack/production.js
+++ b/config/webpack/production.js
@@ -5,7 +5,7 @@ const { URL } = require('url');
 const merge = require('webpack-merge');
 const { BundleAnalyzerPlugin } = require('webpack-bundle-analyzer');
 const OfflinePlugin = require('offline-plugin');
-const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
+const TerserPlugin = require('terser-webpack-plugin');
 const CompressionPlugin = require('compression-webpack-plugin');
 const { output } = require('./configuration');
 const sharedConfig = require('./shared');
@@ -33,20 +33,10 @@ module.exports = merge(sharedConfig, {
   optimization: {
     minimize: true,
     minimizer: [
-      new UglifyJsPlugin({
+      new TerserPlugin({
         cache: true,
         parallel: true,
         sourceMap: true,
-
-        uglifyOptions: {
-          compress: {
-            warnings: false,
-          },
-
-          output: {
-            comments: false,
-          },
-        },
       }),
     ],
   },
@@ -64,6 +54,7 @@ module.exports = merge(sharedConfig, {
     }),
     new OfflinePlugin({
       publicPath: output.publicPath, // sw.js must be served from the root to avoid scope issues
+      safeToUseOptionalCaches: true,
       caches: {
         main: [':rest:'],
         additional: [':externals:'],
diff --git a/package.json b/package.json
index 5c30c4c98..379952156 100644
--- a/package.json
+++ b/package.json
@@ -152,9 +152,9 @@
     "sass-loader": "^7.0.3",
     "stringz": "^1.0.0",
     "substring-trie": "^1.0.2",
+    "terser-webpack-plugin": "^1.3.0",
     "throng": "^4.0.0",
     "tiny-queue": "^0.2.1",
-    "uglifyjs-webpack-plugin": "^2.1.2",
     "uuid": "^3.1.0",
     "webpack": "^4.29.6",
     "webpack-assets-manifest": "^3.1.1",
diff --git a/yarn.lock b/yarn.lock
index 88a642b1c..bb1936a7f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2097,7 +2097,7 @@ bytes@3.1.0:
   resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.1.0.tgz#f6cf7933a360e0588fa9fde85651cdc7f805d1f6"
   integrity sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg==
 
-cacache@^11.0.2, cacache@^11.2.0:
+cacache@^11.0.2, cacache@^11.2.0, cacache@^11.3.2:
   version "11.3.2"
   resolved "https://registry.yarnpkg.com/cacache/-/cacache-11.3.2.tgz#2d81e308e3d258ca38125b676b98b2ac9ce69bfa"
   integrity sha512-E0zP4EPGDOaT2chM08Als91eYnf8Z+eH1awwwVsngUmgppfM5jjJ8l3z5vO5p5w/I3LsiXawb1sW0VY65pQABg==
@@ -8495,6 +8495,11 @@ serialize-javascript@^1.4.0:
   resolved "https://registry.yarnpkg.com/serialize-javascript/-/serialize-javascript-1.6.1.tgz#4d1f697ec49429a847ca6f442a2a755126c4d879"
   integrity sha512-A5MOagrPFga4YaKQSWHryl7AXvbQkEqpw4NNYMTNYUNV51bA8ABHgYFpqKx+YFFrw59xMV1qGH1R4AgoNIVgCw==
 
+serialize-javascript@^1.7.0:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/serialize-javascript/-/serialize-javascript-1.7.0.tgz#d6e0dfb2a3832a8c94468e6eb1db97e55a192a65"
+  integrity sha512-ke8UG8ulpFOxO8f8gRYabHQe/ZntKlcig2Mp+8+URDP1D8vJZ0KUt7LYo07q25Z/+JVSgpr/cui9PIp5H6/+nA==
+
 serve-index@^1.9.1:
   version "1.9.1"
   resolved "https://registry.yarnpkg.com/serve-index/-/serve-index-1.9.1.tgz#d3768d69b1e7d82e5ce050fff5b453bea12a9239"
@@ -8702,6 +8707,14 @@ source-map-support@^0.5.6, source-map-support@~0.5.6:
     buffer-from "^1.0.0"
     source-map "^0.6.0"
 
+source-map-support@~0.5.10:
+  version "0.5.12"
+  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.12.tgz#b4f3b10d51857a5af0138d3ce8003b201613d599"
+  integrity sha512-4h2Pbvyy15EE02G+JOZpUCmqWJuqrs+sEkzewTm++BPi7Hvn/HwcqLAcNxYAyI0x13CpPPn+kMjl+hplXMHITQ==
+  dependencies:
+    buffer-from "^1.0.0"
+    source-map "^0.6.0"
+
 source-map-url@^0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/source-map-url/-/source-map-url-0.4.0.tgz#3e935d7ddd73631b97659956d55128e87b5084a3"
@@ -9090,6 +9103,22 @@ terser-webpack-plugin@^1.1.0:
     webpack-sources "^1.1.0"
     worker-farm "^1.5.2"
 
+terser-webpack-plugin@^1.3.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/terser-webpack-plugin/-/terser-webpack-plugin-1.3.0.tgz#69aa22426299f4b5b3775cbed8cb2c5d419aa1d4"
+  integrity sha512-W2YWmxPjjkUcOWa4pBEv4OP4er1aeQJlSo2UhtCFQCuRXEHjOFscO8VyWHj9JLlA0RzQb8Y2/Ta78XZvT54uGg==
+  dependencies:
+    cacache "^11.3.2"
+    find-cache-dir "^2.0.0"
+    is-wsl "^1.1.0"
+    loader-utils "^1.2.3"
+    schema-utils "^1.0.0"
+    serialize-javascript "^1.7.0"
+    source-map "^0.6.1"
+    terser "^4.0.0"
+    webpack-sources "^1.3.0"
+    worker-farm "^1.7.0"
+
 terser@^3.8.1:
   version "3.14.0"
   resolved "https://registry.yarnpkg.com/terser/-/terser-3.14.0.tgz#49a8ddf34a1308a901d787dab03a42c51b557447"
@@ -9099,6 +9128,15 @@ terser@^3.8.1:
     source-map "~0.6.1"
     source-map-support "~0.5.6"
 
+terser@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-4.0.0.tgz#ef356f6f359a963e2cc675517f21c1c382877374"
+  integrity sha512-dOapGTU0hETFl1tCo4t56FN+2jffoKyER9qBGoUFyZ6y7WLoKT0bF+lAYi6B6YsILcGF3q1C2FBh8QcKSCgkgA==
+  dependencies:
+    commander "^2.19.0"
+    source-map "~0.6.1"
+    source-map-support "~0.5.10"
+
 test-exclude@^5.0.0:
   version "5.1.0"
   resolved "https://registry.yarnpkg.com/test-exclude/-/test-exclude-5.1.0.tgz#6ba6b25179d2d38724824661323b73e03c0c1de1"
@@ -9300,7 +9338,7 @@ ua-parser-js@^0.7.18:
   resolved "https://registry.yarnpkg.com/ua-parser-js/-/ua-parser-js-0.7.19.tgz#94151be4c0a7fb1d001af7022fdaca4642659e4b"
   integrity sha512-T3PVJ6uz8i0HzPxOF9SWzWAlfN/DavlpQqepn22xgve/5QecC+XMCAtmUNnY7C9StehaV6exjUCI801lOI7QlQ==
 
-uglify-js@^3.0.0, uglify-js@^3.1.4:
+uglify-js@^3.1.4:
   version "3.4.9"
   resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.4.9.tgz#af02f180c1207d76432e473ed24a28f4a782bae3"
   integrity sha512-8CJsbKOtEbnJsTyv6LE6m6ZKniqMiFWmm9sRbopbkGs3gMPPfd3Fh8iIA4Ykv5MgaTbqHr4BaoGLJLZNhsrW1Q==
@@ -9308,20 +9346,6 @@ uglify-js@^3.0.0, uglify-js@^3.1.4:
     commander "~2.17.1"
     source-map "~0.6.1"
 
-uglifyjs-webpack-plugin@^2.1.2:
-  version "2.1.2"
-  resolved "https://registry.yarnpkg.com/uglifyjs-webpack-plugin/-/uglifyjs-webpack-plugin-2.1.2.tgz#70e5c38fb2d35ee887949c2a0adb2656c23296d5"
-  integrity sha512-G1fJx2uOAAfvdZ77SVCzmFo6mv8uKaHoZBL9Qq/ciC8r6p0ANOL1uY85fIUiyWXKw5RzAaJYZfNSL58Or2hQ0A==
-  dependencies:
-    cacache "^11.2.0"
-    find-cache-dir "^2.0.0"
-    schema-utils "^1.0.0"
-    serialize-javascript "^1.4.0"
-    source-map "^0.6.1"
-    uglify-js "^3.0.0"
-    webpack-sources "^1.1.0"
-    worker-farm "^1.5.2"
-
 unicode-astral-regex@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/unicode-astral-regex/-/unicode-astral-regex-1.0.1.tgz#2cab8529480646f9614ddbc7b62158ad05123feb"
@@ -9814,6 +9838,13 @@ worker-farm@^1.5.2:
   dependencies:
     errno "~0.1.7"
 
+worker-farm@^1.7.0:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/worker-farm/-/worker-farm-1.7.0.tgz#26a94c5391bbca926152002f69b84a4bf772e5a8"
+  integrity sha512-rvw3QTZc8lAxyVrqcSGVm5yP/IJ2UcB3U0graE3LCFoZ0Yn2x4EoVSqJKdB/T5M+FLcRPjz4TDacRf3OCfNUzw==
+  dependencies:
+    errno "~0.1.7"
+
 wrap-ansi@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-2.1.0.tgz#d8fc3d284dd05794fe84973caecdd1cf824fdd85"