diff --git a/package.json b/package.json
index a65ed87..3c92d91 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,7 @@
     "grunt-contrib-uglify": "1.0.1",
     "grunt-contrib-watch": "1.0.0",
     "lodash": "4.17.10",
+    "less": "^4.1.2",
     "mocha": "4.0.1",
     "open": "0.0.5",
     "prettier": "1.8.2"