diff --git a/lib/less/index.js b/lib/less/index.js
index 384b2a25..0858e8b5 100644
--- a/lib/less/index.js
+++ b/lib/less/index.js
@@ -3,7 +3,7 @@ var path = require('path'),
     fs = require('fs');
 
 var less = {
-    version: [1, 3, 0],
+    version: [1, 3, 1],
     Parser: require('./parser').Parser,
     importer: require('./parser').importer,
     tree: require('./tree'),