diff --git a/bin/package.json b/bin/package.json
index 1d5b5af..bf85f3f 100644
--- a/bin/package.json
+++ b/bin/package.json
@@ -2,7 +2,8 @@
   "name": "lessjs-windows",  
   "version": "0.0.1",  
   "dependencies" : {  
-    "less" : ">=0.1"
+    "less" : ">=0.1",
+    "less-plugin-clean-css": ">=0.1"
   },  
   "engine": {  
     "node": ">=0.6"