diff --git a/package.json b/package.json
index a87644e674..10d609fe50 100644
--- a/package.json
+++ b/package.json
@@ -84,6 +84,7 @@
     "xss": "^1.0.3"
   },
   "devDependencies": {
+    "@gfx/zopfli": "^1.0.8",
     "babel-core": "^6.26.3",
     "babel-eslint": "^8.2.3",
     "babel-loader": "^7.1.4",
@@ -93,7 +94,7 @@
     "babel-preset-env": "^1.7.0",
     "babel-preset-es2015": "^6.24.1",
     "chai": "^4.1.2",
-    "compression-webpack-plugin": "^1.1.11",
+    "compression-webpack-plugin": "^2.0.0",
     "copy-webpack-plugin": "^4.5.1",
     "del": "^3.0.0",
     "eslint": "^4.19.1",
diff --git a/webpack.config.js b/webpack.config.js
index a8aea295c6..57b4792a6a 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -6,6 +6,7 @@ const CopyWebpackPlugin = require('copy-webpack-plugin');
 const WorkboxPlugin = require('workbox-webpack-plugin');
 const CompressionPlugin = require("compression-webpack-plugin");
 const HtmlWebpackPlugin = require('html-webpack-plugin');
+const zopfli = require('@gfx/zopfli');
 const translationMetadata = require('./build-translations/translationMetadata.json');
 
 const version = fs.readFileSync('setup.py', 'utf8').match(/\d{8}[^']*/);
@@ -138,7 +139,10 @@ function createConfig(isProdBuild, latestBuild) {
           /\.LICENSE$/,
           /\.py$/,
           /\.txt$/,
-        ]
+       ],
+       algorithm(input, compressionOptions, callback) {
+         return zopfli.gzip(input, compressionOptions, callback);
+       },
       }),
       new WorkboxPlugin.InjectManifest({
         swSrc: './src/entrypoints/service-worker-bootstrap.js',
diff --git a/yarn.lock b/yarn.lock
index e75f1c2ce8..16ba2dac13 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -577,6 +577,12 @@
     lodash "^4.17.5"
     to-fast-properties "^2.0.0"
 
+"@gfx/zopfli@^1.0.8":
+  version "1.0.8"
+  resolved "https://registry.yarnpkg.com/@gfx/zopfli/-/zopfli-1.0.8.tgz#4bad09d5c8bd8156e018716228e9d84e2347b3f0"
+  dependencies:
+    base64-js "^1.0.0"
+
 "@mdi/svg@^2.4.85":
   version "2.7.94"
   resolved "https://registry.yarnpkg.com/@mdi/svg/-/svg-2.7.94.tgz#5f2b03c363b10f7e4cf8c8a5fdc81cbd838bf44b"
@@ -1953,6 +1959,10 @@ agent-base@2:
     extend "~3.0.0"
     semver "~5.0.1"
 
+ajv-errors@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/ajv-errors/-/ajv-errors-1.0.0.tgz#ecf021fa108fd17dfb5e6b383f2dd233e31ffc59"
+
 ajv-keywords@^2.1.0:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-2.1.1.tgz#617997fc5f60576894c435f940d819e135b80762"
@@ -3135,7 +3145,7 @@ base64-js@1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/base64-js/-/base64-js-1.2.0.tgz#a39992d723584811982be5e290bb6a53d86700f1"
 
-base64-js@^1.0.2:
+base64-js@^1.0.0, base64-js@^1.0.2:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/base64-js/-/base64-js-1.3.0.tgz#cab1e6118f051095e58b5281aea8c1cd22bfc0e3"
 
@@ -3492,7 +3502,7 @@ bytes@3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.0.0.tgz#d32815404d689699f85a4ea4fa8755dd13a96048"
 
-cacache@^10.0.1, cacache@^10.0.4:
+cacache@^10.0.4:
   version "10.0.4"
   resolved "https://registry.yarnpkg.com/cacache/-/cacache-10.0.4.tgz#6452367999eff9d4188aefd9a14e9d7c6a263460"
   dependencies:
@@ -3510,6 +3520,25 @@ cacache@^10.0.1, cacache@^10.0.4:
     unique-filename "^1.1.0"
     y18n "^4.0.0"
 
+cacache@^11.2.0:
+  version "11.2.0"
+  resolved "https://registry.yarnpkg.com/cacache/-/cacache-11.2.0.tgz#617bdc0b02844af56310e411c0878941d5739965"
+  dependencies:
+    bluebird "^3.5.1"
+    chownr "^1.0.1"
+    figgy-pudding "^3.1.0"
+    glob "^7.1.2"
+    graceful-fs "^4.1.11"
+    lru-cache "^4.1.3"
+    mississippi "^3.0.0"
+    mkdirp "^0.5.1"
+    move-concurrently "^1.0.1"
+    promise-inflight "^1.0.1"
+    rimraf "^2.6.2"
+    ssri "^6.0.0"
+    unique-filename "^1.1.0"
+    y18n "^4.0.0"
+
 cache-base@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/cache-base/-/cache-base-1.0.1.tgz#0a7f46416831c8b662ee36fe4e7c59d76f666ab2"
@@ -4004,13 +4033,14 @@ compressible@~2.0.14:
   dependencies:
     mime-db ">= 1.34.0 < 2"
 
-compression-webpack-plugin@^1.1.11:
-  version "1.1.11"
-  resolved "https://registry.yarnpkg.com/compression-webpack-plugin/-/compression-webpack-plugin-1.1.11.tgz#8384c7a6ead1d2e2efb190bdfcdcf35878ed8266"
+compression-webpack-plugin@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/compression-webpack-plugin/-/compression-webpack-plugin-2.0.0.tgz#46476350c1eb27f783dccc79ac2f709baa2cffbc"
   dependencies:
-    cacache "^10.0.1"
-    find-cache-dir "^1.0.0"
+    cacache "^11.2.0"
+    find-cache-dir "^2.0.0"
     neo-async "^2.5.0"
+    schema-utils "^1.0.0"
     serialize-javascript "^1.4.0"
     webpack-sources "^1.0.1"
 
@@ -5449,6 +5479,10 @@ fecha@^2.3.3, "fecha@https://github.com/balloob/fecha/archive/51d14fd0eb4781e2ec
   version "2.3.3"
   resolved "https://github.com/balloob/fecha/archive/51d14fd0eb4781e2ecf265d1c3080706259133b5.tar.gz#bfb1e49121dd7821601af35faf4fe93dbd19200a"
 
+figgy-pudding@^3.1.0, figgy-pudding@^3.5.1:
+  version "3.5.1"
+  resolved "https://registry.yarnpkg.com/figgy-pudding/-/figgy-pudding-3.5.1.tgz#862470112901c727a0e495a80744bd5baa1d6790"
+
 figures@^1.3.5:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/figures/-/figures-1.7.0.tgz#cbe1e3affcf1cd44b80cadfed28dc793a9701d2e"
@@ -5528,6 +5562,14 @@ find-cache-dir@^1.0.0:
     make-dir "^1.0.0"
     pkg-dir "^2.0.0"
 
+find-cache-dir@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/find-cache-dir/-/find-cache-dir-2.0.0.tgz#4c1faed59f45184530fb9d7fa123a4d04a98472d"
+  dependencies:
+    commondir "^1.0.1"
+    make-dir "^1.0.0"
+    pkg-dir "^3.0.0"
+
 find-index@^0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/find-index/-/find-index-0.1.1.tgz#675d358b2ca3892d795a1ab47232f8b6e2e0dde4"
@@ -5569,6 +5611,12 @@ find-up@^2.0.0, find-up@^2.1.0:
   dependencies:
     locate-path "^2.0.0"
 
+find-up@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/find-up/-/find-up-3.0.0.tgz#49169f1d7993430646da61ecc5ae355c21c97b73"
+  dependencies:
+    locate-path "^3.0.0"
+
 findup-sync@^0.4.2:
   version "0.4.3"
   resolved "https://registry.yarnpkg.com/findup-sync/-/findup-sync-0.4.3.tgz#40043929e7bc60adf0b7f4827c4c6e75a0deca12"
@@ -7540,6 +7588,13 @@ locate-path@^2.0.0:
     p-locate "^2.0.0"
     path-exists "^3.0.0"
 
+locate-path@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/locate-path/-/locate-path-3.0.0.tgz#dbec3b3ab759758071b58fe59fc41871af21400e"
+  dependencies:
+    p-locate "^3.0.0"
+    path-exists "^3.0.0"
+
 lodash._baseassign@^3.0.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/lodash._baseassign/-/lodash._baseassign-3.2.0.tgz#8c38a099500f215ad09e59f1722fd0c52bfe0a4e"
@@ -7972,7 +8027,7 @@ lru-cache@2:
   version "2.7.3"
   resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-2.7.3.tgz#6d4524e8b955f95d4f5b58851ce21dd72fb4e952"
 
-lru-cache@^4.0.1, lru-cache@^4.0.2, lru-cache@^4.1.1:
+lru-cache@^4.0.1, lru-cache@^4.0.2, lru-cache@^4.1.1, lru-cache@^4.1.3:
   version "4.1.3"
   resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-4.1.3.tgz#a1175cf3496dfc8436c156c334b4955992bce69c"
   dependencies:
@@ -8292,6 +8347,21 @@ mississippi@^2.0.0:
     stream-each "^1.1.0"
     through2 "^2.0.0"
 
+mississippi@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/mississippi/-/mississippi-3.0.0.tgz#ea0a3291f97e0b5e8776b363d5f0a12d94c67022"
+  dependencies:
+    concat-stream "^1.5.0"
+    duplexify "^3.4.2"
+    end-of-stream "^1.1.0"
+    flush-write-stream "^1.0.0"
+    from2 "^2.1.0"
+    parallel-transform "^1.1.0"
+    pump "^3.0.0"
+    pumpify "^1.3.3"
+    stream-each "^1.1.0"
+    through2 "^2.0.0"
+
 mixin-deep@^1.2.0:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/mixin-deep/-/mixin-deep-1.3.1.tgz#a49e7268dce1a0d9698e45326c5626df3543d0fe"
@@ -8878,12 +8948,24 @@ p-limit@^1.0.0, p-limit@^1.1.0:
   dependencies:
     p-try "^1.0.0"
 
+p-limit@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/p-limit/-/p-limit-2.0.0.tgz#e624ed54ee8c460a778b3c9f3670496ff8a57aec"
+  dependencies:
+    p-try "^2.0.0"
+
 p-locate@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/p-locate/-/p-locate-2.0.0.tgz#20a0103b222a70c8fd39cc2e580680f3dde5ec43"
   dependencies:
     p-limit "^1.1.0"
 
+p-locate@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/p-locate/-/p-locate-3.0.0.tgz#322d69a05c0264b25997d9f40cd8a891ab0064a4"
+  dependencies:
+    p-limit "^2.0.0"
+
 p-map@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/p-map/-/p-map-1.1.1.tgz#05f5e4ae97a068371bc2a5cc86bfbdbc19c4ae7a"
@@ -8898,6 +8980,10 @@ p-try@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/p-try/-/p-try-1.0.0.tgz#cbc79cdbaf8fd4228e13f621f2b1a237c1b207b3"
 
+p-try@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/p-try/-/p-try-2.0.0.tgz#85080bb87c64688fa47996fe8f7dfbe8211760b1"
+
 package-json@^2.0.0:
   version "2.4.0"
   resolved "https://registry.yarnpkg.com/package-json/-/package-json-2.4.0.tgz#0d15bd67d1cbbddbb2ca222ff2edb86bcb31a8bb"
@@ -9157,6 +9243,12 @@ pkg-dir@^2.0.0:
   dependencies:
     find-up "^2.1.0"
 
+pkg-dir@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/pkg-dir/-/pkg-dir-3.0.0.tgz#2749020f239ed990881b1f71210d51eb6523bea3"
+  dependencies:
+    find-up "^3.0.0"
+
 plist@^2.0.1:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/plist/-/plist-2.1.0.tgz#57ccdb7a0821df21831217a3cad54e3e146a1025"
@@ -9700,6 +9792,13 @@ pump@^2.0.0, pump@^2.0.1:
     end-of-stream "^1.1.0"
     once "^1.3.1"
 
+pump@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/pump/-/pump-3.0.0.tgz#b4a2116815bde2f4e1ea602354e8c75565107a64"
+  dependencies:
+    end-of-stream "^1.1.0"
+    once "^1.3.1"
+
 pumpify@^1.3.3:
   version "1.5.1"
   resolved "https://registry.yarnpkg.com/pumpify/-/pumpify-1.5.1.tgz#36513be246ab27570b1a374a5ce278bfd74370ce"
@@ -10397,6 +10496,14 @@ schema-utils@^0.4.4, schema-utils@^0.4.5:
     ajv "^6.1.0"
     ajv-keywords "^3.1.0"
 
+schema-utils@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/schema-utils/-/schema-utils-1.0.0.tgz#0b79a93204d7b600d4b2850d1f66c2a34951c770"
+  dependencies:
+    ajv "^6.1.0"
+    ajv-errors "^1.0.0"
+    ajv-keywords "^3.1.0"
+
 scoped-regex@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/scoped-regex/-/scoped-regex-1.0.0.tgz#a346bb1acd4207ae70bd7c0c7ca9e566b6baddb8"
@@ -10925,6 +11032,12 @@ ssri@^5.2.4:
   dependencies:
     safe-buffer "^5.1.1"
 
+ssri@^6.0.0:
+  version "6.0.1"
+  resolved "https://registry.yarnpkg.com/ssri/-/ssri-6.0.1.tgz#2a3c41b28dd45b62b63676ecb74001265ae9edd8"
+  dependencies:
+    figgy-pudding "^3.5.1"
+
 stable@^0.1.6:
   version "0.1.8"
   resolved "https://registry.yarnpkg.com/stable/-/stable-0.1.8.tgz#836eb3c8382fe2936feaf544631017ce7d47a3cf"