diff --git a/package.json b/package.json
index 5a0a222c..54eb590f 100644
--- a/package.json
+++ b/package.json
@@ -51,11 +51,10 @@
     "gulp-imagemin": "^7.1.0",
     "gulp-postcss": "^8.0.0",
     "gulp-stylelint": "^6.0.0",
-    "gulp-uglify": "^3.0.0",
     "gulp-util": "^3.0.8",
     "gulp-vinyl-zip": "^2.2.1",
     "handlebars": "^4.7.6",
-    "highlight.js": "^9.18.1",
+    "highlight.js": "^10.4.1",
     "jquery": "^3.5.1",
     "js-yaml": "^3.14.1",
     "map-stream": "^0.0.7",
@@ -80,6 +79,7 @@
     "documentation"
   ],
   "devDependencies": {
-    "core-js": "^3.8.1"
+    "core-js": "^3.8.1",
+    "gulp-terser": "^2.0.0"
   }
 }
diff --git a/preview-site-src/index.html b/preview-site-src/index.html
index 70b1a4b8..63fd1679 100644
--- a/preview-site-src/index.html
+++ b/preview-site-src/index.html
@@ -57,7 +57,7 @@ <h2 id="cu-solet"><a class="anchor" href="#cu-solet"></a>Cu solet</h2>
     file.contents = browserify(file.relative, { basedir: 'src', detectGlobals: false }).bundle()
   }))
   .pipe(buffer())
-  .pipe(uglify())
+  .pipe(terser())
   .pipe(gulp.dest('build'))</code></pre>
 </div>
 </div>
diff --git a/src/js/vendor/highlight.js b/src/js/vendor/highlight.js
index 88242454..d817c755 100644
--- a/src/js/vendor/highlight.js
+++ b/src/js/vendor/highlight.js
@@ -4,7 +4,7 @@ hljs.registerLanguage('asciidoc', require('highlight.js/lib/languages/asciidoc')
 hljs.registerLanguage('bash', require('highlight.js/lib/languages/bash'))
 hljs.registerLanguage('clojure', require('highlight.js/lib/languages/clojure'))
 hljs.registerLanguage('cpp', require('highlight.js/lib/languages/cpp'))
-hljs.registerLanguage('cs', require('highlight.js/lib/languages/cs'))
+hljs.registerLanguage('csharp', require('highlight.js/lib/languages/csharp'))
 hljs.registerLanguage('css', require('highlight.js/lib/languages/css'))
 hljs.registerLanguage('diff', require('highlight.js/lib/languages/diff'))
 hljs.registerLanguage('dockerfile', require('highlight.js/lib/languages/dockerfile'))
diff --git a/tasks/build.js b/tasks/build.js
index 03808ddd..06783c7f 100644
--- a/tasks/build.js
+++ b/tasks/build.js
@@ -16,7 +16,7 @@ const postcssCalc = require('postcss-calc')
 const postcssImport = require('postcss-import')
 const postcssUrl = require('postcss-url')
 const postcssVar = require('postcss-custom-properties')
-const uglify = require('gulp-uglify')
+const terser = require('gulp-terser')
 const vfs = require('vinyl-fs')
 
 module.exports = (src, dest) => {
@@ -51,7 +51,7 @@ module.exports = (src, dest) => {
   return merge([
     vfs
       .src('js/+([0-9])-*.js', opts)
-      .pipe(uglify())
+      .pipe(terser())
       .pipe(concat('js/site.js')),
 
     vfs
@@ -64,7 +64,7 @@ module.exports = (src, dest) => {
         })
       )
       .pipe(buffer())
-      .pipe(uglify()),
+      .pipe(terser()),
 
     vfs.src('css/site.css', opts).pipe(postcss(postcssPlugins)),
 
diff --git a/yarn.lock b/yarn.lock
index 75660f33..43b20a06 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1423,7 +1423,7 @@ combine-source-map@^0.8.0, combine-source-map@~0.8.0:
     lodash.memoize "~3.0.3"
     source-map "~0.5.3"
 
-commander@^2.8.1:
+commander@^2.20.0, commander@^2.8.1:
   version "2.20.3"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
   integrity sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==
@@ -3539,21 +3539,15 @@ gulp-stylelint@^6.0.0:
     strip-ansi "^4.0.0"
     through2 "^2.0.3"
 
-gulp-uglify@^3.0.0:
-  version "3.0.2"
-  resolved "https://registry.yarnpkg.com/gulp-uglify/-/gulp-uglify-3.0.2.tgz#5f5b2e8337f879ca9dec971feb1b82a5a87850b0"
-  integrity sha512-gk1dhB74AkV2kzqPMQBLA3jPoIAPd/nlNzP2XMDSG8XZrqnlCiDGAqC+rZOumzFvB5zOphlFh6yr3lgcAb/OOg==
+gulp-terser@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/gulp-terser/-/gulp-terser-2.0.0.tgz#07f95ef9121fe9d4970c3c4ee775c9cd658d0474"
+  integrity sha512-8KxzgUpNeLsSujUCrNKUiSI1ioO5TfW4ODhbM+wzNTWgYp7yCIl1c/5EeOI+SOXaNLi+BzzMqrbb0eYMIThFCQ==
   dependencies:
-    array-each "^1.0.1"
-    extend-shallow "^3.0.2"
-    gulplog "^1.0.0"
-    has-gulplog "^0.1.0"
-    isobject "^3.0.1"
-    make-error-cause "^1.1.1"
-    safe-buffer "^5.1.2"
-    through2 "^2.0.0"
-    uglify-js "^3.0.5"
-    vinyl-sourcemaps-apply "^0.2.0"
+    plugin-error "^1.0.1"
+    terser "5.4.0"
+    through2 "^4.0.2"
+    vinyl-sourcemaps-apply "^0.2.1"
 
 gulp-util@^3.0.8:
   version "3.0.8"
@@ -3727,10 +3721,10 @@ hex-color-regex@^1.1.0:
   resolved "https://registry.yarnpkg.com/hex-color-regex/-/hex-color-regex-1.1.0.tgz#4c06fccb4602fe2602b3c93df82d7e7dbf1a8a8e"
   integrity sha512-l9sfDFsuqtOqKDsQdqrMRk0U85RZc0RtOR9yPI7mRVOa4FsR/BVnZ0shmQRM96Ji99kYZP/7hn1cedc1+ApsTQ==
 
-highlight.js@^9.18.1:
-  version "9.18.5"
-  resolved "https://registry.yarnpkg.com/highlight.js/-/highlight.js-9.18.5.tgz#d18a359867f378c138d6819edfc2a8acd5f29825"
-  integrity sha512-a5bFyofd/BHCX52/8i8uJkjr9DYwXIPnM/plwI6W7ezItLGqzt7X2G2nXuYSfsIJdkwwj/g9DG1LkcGJI/dDoA==
+highlight.js@^10.4.1:
+  version "10.4.1"
+  resolved "https://registry.yarnpkg.com/highlight.js/-/highlight.js-10.4.1.tgz#d48fbcf4a9971c4361b3f95f302747afe19dbad0"
+  integrity sha512-yR5lWvNz7c85OhVAEAeFhVCc/GV4C30Fjzc/rCP0aCWzc1UUOPUk55dK/qdwTZHBvMZo+eZ2jpk62ndX/xMFlg==
 
 hmac-drbg@^1.0.0:
   version "1.0.1"
@@ -4977,18 +4971,6 @@ make-dir@^3.0.0:
   dependencies:
     semver "^6.0.0"
 
-make-error-cause@^1.1.1:
-  version "1.2.2"
-  resolved "https://registry.yarnpkg.com/make-error-cause/-/make-error-cause-1.2.2.tgz#df0388fcd0b37816dff0a5fb8108939777dcbc9d"
-  integrity sha1-3wOI/NCzeBbf8KX7gQiTl3fcvJ0=
-  dependencies:
-    make-error "^1.2.0"
-
-make-error@^1.2.0:
-  version "1.3.6"
-  resolved "https://registry.yarnpkg.com/make-error/-/make-error-1.3.6.tgz#2eb2e37ea9b67c4891f684a1394799af484cf7a2"
-  integrity sha512-s8UhlNe7vPKomQhC1qFelMokr/Sc3AgNbso3n74mVPA5LTZwkB9NlXf4XPamLxJE8h0gh73rM94xvwRT2CVInw==
-
 make-iterator@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/make-iterator/-/make-iterator-1.0.1.tgz#29b33f312aa8f547c4a5e490f56afcec99133ad6"
@@ -6752,6 +6734,15 @@ read-pkg@^3.0.0:
     normalize-package-data "^2.3.2"
     path-type "^3.0.0"
 
+readable-stream@3, readable-stream@^3.1.1, readable-stream@^3.5.0, readable-stream@^3.6.0:
+  version "3.6.0"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-3.6.0.tgz#337bbda3adc0706bd3e024426a286d4b4b2c9198"
+  integrity sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==
+  dependencies:
+    inherits "^2.0.3"
+    string_decoder "^1.1.1"
+    util-deprecate "^1.0.1"
+
 readable-stream@^2.0.0, readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.5, readable-stream@^2.1.5, readable-stream@^2.2.2, readable-stream@^2.3.0, readable-stream@^2.3.3, readable-stream@^2.3.5, readable-stream@^2.3.6, readable-stream@~2.3.6:
   version "2.3.7"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.7.tgz#1eca1cf711aef814c04f62252a36a62f6cb23b57"
@@ -6765,15 +6756,6 @@ readable-stream@^2.0.0, readable-stream@^2.0.1, readable-stream@^2.0.2, readable
     string_decoder "~1.1.1"
     util-deprecate "~1.0.1"
 
-readable-stream@^3.1.1, readable-stream@^3.5.0, readable-stream@^3.6.0:
-  version "3.6.0"
-  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-3.6.0.tgz#337bbda3adc0706bd3e024426a286d4b4b2c9198"
-  integrity sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==
-  dependencies:
-    inherits "^2.0.3"
-    string_decoder "^1.1.1"
-    util-deprecate "^1.0.1"
-
 readable-stream@~1.1.9:
   version "1.1.14"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.1.14.tgz#7cf4c54ef648e3813084c636dd2079e166c081d9"
@@ -7419,6 +7401,14 @@ source-map-resolve@^0.5.0:
     source-map-url "^0.4.0"
     urix "^0.1.0"
 
+source-map-support@~0.5.19:
+  version "0.5.19"
+  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.19.tgz#a98b62f86dcaf4f67399648c085291ab9e8fed61"
+  integrity sha512-Wonm7zOCIJzBGQdB+thsPar0kYuCIzYvxZwlBa87yi/Mdjv7Tip2cyVbLj5o0cFPN4EVkuTwb3GDDyUx2DGnGw==
+  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"
@@ -7429,11 +7419,16 @@ source-map@^0.5.1, source-map@^0.5.6, source-map@~0.5.3:
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
   integrity sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=
 
-source-map@^0.6.1:
+source-map@^0.6.0, source-map@^0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
   integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
 
+source-map@~0.7.2:
+  version "0.7.3"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.7.3.tgz#5302f8169031735226544092e64981f751750383"
+  integrity sha512-CkCj6giN3S+n9qrYiBTX5gystlENnRW5jZeNLHpe6aue+SrHcG5VYwujhW9s4dY31mEGsxBDrHR6oI69fTXsaQ==
+
 sparkles@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/sparkles/-/sparkles-1.0.1.tgz#008db65edce6c50eec0c5e228e1945061dd0437c"
@@ -7954,6 +7949,15 @@ tempfile@^2.0.0:
     temp-dir "^1.0.0"
     uuid "^3.0.1"
 
+terser@5.4.0:
+  version "5.4.0"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-5.4.0.tgz#9815c0839072d5c894e22c6fc508fbe9f5e7d7e8"
+  integrity sha512-3dZunFLbCJis9TAF2VnX+VrQLctRUmt1p3W2kCsJuZE4ZgWqh//+1MZ62EanewrqKoUf4zIaDGZAvml4UDc0OQ==
+  dependencies:
+    commander "^2.20.0"
+    source-map "~0.7.2"
+    source-map-support "~0.5.19"
+
 text-table@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/text-table/-/text-table-0.2.0.tgz#7f5ee823ae805207c00af2df4a84ec3fcfa570b4"
@@ -7982,6 +7986,13 @@ through2@^2.0.0, through2@^2.0.3, through2@~2.0.0:
     readable-stream "~2.3.6"
     xtend "~4.0.1"
 
+through2@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/through2/-/through2-4.0.2.tgz#a7ce3ac2a7a8b0b966c80e7c49f0484c3b239764"
+  integrity sha512-iOqSav00cVxEEICeD7TjLB1sueEL+81Wpzp2bY17uZjZN0pWZPuo4suZ/61VujxmqSGFfgOcNuTZ85QJwNZQpw==
+  dependencies:
+    readable-stream "3"
+
 "through@>=2.2.7 <3", through@^2.3.6, through@^2.3.8:
   version "2.3.8"
   resolved "https://registry.yarnpkg.com/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"
@@ -8205,7 +8216,7 @@ typescript@^3.9.3:
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.7.tgz#98d600a5ebdc38f40cb277522f12dc800e9e25fa"
   integrity sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw==
 
-uglify-js@^3.0.5, uglify-js@^3.1.4:
+uglify-js@^3.1.4:
   version "3.12.2"
   resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.12.2.tgz#c7ae89da0ed1bb58999c7fce07190b347fdbdaba"
   integrity sha512-rWYleAvfJPjduYCt+ELvzybNah/zIkRteGXIBO8X0lteRZPGladF61hFi8tU7qKTsF7u6DUQCtT9k00VlFOgkg==
@@ -8553,7 +8564,7 @@ vinyl-sourcemap@^1.1.0:
     remove-bom-buffer "^3.0.0"
     vinyl "^2.0.0"
 
-vinyl-sourcemaps-apply@^0.2.0, vinyl-sourcemaps-apply@^0.2.1:
+vinyl-sourcemaps-apply@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/vinyl-sourcemaps-apply/-/vinyl-sourcemaps-apply-0.2.1.tgz#ab6549d61d172c2b1b87be5c508d239c8ef87705"
   integrity sha1-q2VJ1h0XLCsbh75cUI0jnI74dwU=