diff --git a/package.json b/package.json
index a99a6284..79ac56b3 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
     "eslint": "^5.1.0",
     "fs-extra": "^7.0.0",
     "jsonlint": "^1.6.3",
+    "less": "^3.7.1",
     "updates": "^3.2.3"
   },
   "scripts": {
diff --git a/tools/update-libraries.js b/tools/update-libraries.js
index e6ace08c..c4a5800a 100644
--- a/tools/update-libraries.js
+++ b/tools/update-libraries.js
@@ -40,6 +40,9 @@ const files = {
   ],
   'jsonlint': [
     'lib/jsonlint.js → jsonlint.js'
+  ],
+  'less': [
+    'dist/less.min.js → less.min.js'
   ]
 };
 
diff --git a/vendor/less/README.md b/vendor/less/README.md
new file mode 100644
index 00000000..e78c0c98
--- /dev/null
+++ b/vendor/less/README.md
@@ -0,0 +1,10 @@
+## LESS v0.0.0
+
+less.js installed via npm - source repo:
+
+https://github.com/less/less.js/blob/v0.0.0/dist/less.min.js
+
+If the link doesn't work, it is likely that the npm version and the release versions don't match:
+
+https://www.npmjs.com/package/less
+https://github.com/less/less.js/releases