diff --git a/js/usercss.js b/js/usercss.js
index ff3c9c9a..8f5e6eda 100644
--- a/js/usercss.js
+++ b/js/usercss.js
@@ -47,7 +47,7 @@ var usercss = (() => {
     },
     stylus: {
       preprocess(source, vars) {
-        return loadScript('/vendor/stylus-lang/stylus.min.js').then(() => (
+        return loadScript('/vendor/stylus-lang-bundle/stylus.min.js').then(() => (
           new Promise((resolve, reject) => {
             const varDef = Object.keys(vars).map(key => `${key} = ${vars[key].value};\n`).join('');
             if (!Error.captureStackTrace) Error.captureStackTrace = () => {};
diff --git a/package.json b/package.json
index 689aad18..b510e482 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,7 @@
     "lz-string-unsafe": "^1.4.4-beta",
     "semver-bundle": "^0.1.0",
     "stylelint-bundle": "^8.0.0",
+    "stylus-lang-bundle": "^0.54.5",
     "updates": "^4.0.0"
   },
   "scripts": {
diff --git a/tools/update-libraries.js b/tools/update-libraries.js
index 1870e253..eb6610d0 100644
--- a/tools/update-libraries.js
+++ b/tools/update-libraries.js
@@ -52,6 +52,9 @@ const files = {
   ],
   'stylelint-bundle': [
     'stylelint-bundle.min.js'
+  ],
+  'stylus-lang-bundle': [
+    'stylus.min.js'
   ]
 };
 
diff --git a/vendor/README.md b/vendor/README.md
index 614aedf1..5fc80a61 100644
--- a/vendor/README.md
+++ b/vendor/README.md
@@ -8,8 +8,8 @@ Using this repo, run `npm install`... the latest versions of:
 * `jsonlint` (https://github.com/zaach/jsonlint) is installed.
 * `less` (https://github.com/less/less.js) is installed.
 * `lz-string-unsafe` (https://github.com/openstyles/lz-string-unsafe) is installed.
-* `semver-bundle` (https://github.com/openstyles/semver-bundle) is installed.<br><br>
-* **TODO**: `stylus-lang` (https://github.com/eight04/stylus-lang-bundle) is installed.<br><br>
+* `semver-bundle` (https://github.com/openstyles/semver-bundle) is installed.
+* `stylus-lang` (https://github.com/openstyles/stylus-lang-bundle) is installed.<br><br>
 * The necessary build tools are installed; see `devDependencies` in the `package.json`.
 
 ## Running the build script
@@ -23,3 +23,4 @@ The following changes are made:
 * `less`: The compressed `dist/less.min.js` file is copied directly into `vendor/less`.
 * `lz-string-unsafe`: The compressed `lz-string-unsafe.min.js` file is copied directly into `vendor/lz-string-unsafe`.
 * `semver-bundle`: The `dist/semver.js` file is copied directly into `vendor/semver`.
+* `stylus-lang-bundle`: The `stylus.min.js` file is copied directly into `vendor/stylus-lang-bundle`.
diff --git a/vendor/stylus-lang/LICENSE b/vendor/stylus-lang-bundle/LICENSE
similarity index 90%
rename from vendor/stylus-lang/LICENSE
rename to vendor/stylus-lang-bundle/LICENSE
index 0f96caca..ce962fc4 100644
--- a/vendor/stylus-lang/LICENSE
+++ b/vendor/stylus-lang-bundle/LICENSE
@@ -1,28 +1,29 @@
-http://stylus-lang.com/
-https://github.com/stylus/stylus/
-
-https://github.com/stylus/stylus/blob/dev/LICENSE
-
-
-The MIT License
-
-Copyright (c) Automattic <developer.wordpress.com>
-
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-'Software'), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
-CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
-TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
-SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+http://stylus-lang.com/
+https://github.com/stylus/stylus/
+https://github.com/openstyles/stylus-lang-bundle
+
+https://github.com/openstyles/stylus-lang-bundle/blob/master/LICENSE
+
+
+The MIT License
+
+Copyright (c) Automattic <developer.wordpress.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/vendor/stylus-lang-bundle/README.md b/vendor/stylus-lang-bundle/README.md
new file mode 100644
index 00000000..4886d09f
--- /dev/null
+++ b/vendor/stylus-lang-bundle/README.md
@@ -0,0 +1,5 @@
+## Stylus-lang-bundle v0.0.0
+
+stylus-lang-bundle installed via npm - source repo:
+
+https://github.com/openstyles/stylus-lang-bundle/blob/v0.0.0/stylus.min.js
diff --git a/vendor/stylus-lang/stylus.min.js b/vendor/stylus-lang-bundle/stylus.min.js
similarity index 100%
rename from vendor/stylus-lang/stylus.min.js
rename to vendor/stylus-lang-bundle/stylus.min.js