diff --git a/benchmark/less-benchmark.js b/benchmark/less-benchmark.js
index 36f83e816..72731395e 100644
--- a/benchmark/less-benchmark.js
+++ b/benchmark/less-benchmark.js
@@ -1,6 +1,6 @@
 var path = require('path'),
     fs = require('fs'),
-    sys = require('sys');
+    sys = require('util');
 
 var less = require('../lib/less');
 var file = path.join(__dirname, 'benchmark.less');
diff --git a/bin/lessc b/bin/lessc
index c2e7ceb3f..9bd2228a1 100755
--- a/bin/lessc
+++ b/bin/lessc
@@ -2,7 +2,7 @@
 
 var path = require('path'),
     fs = require('fs'),
-    sys = require('sys');
+    sys = require('util');
 
 var less = require('../lib/less');
 var args = process.argv.slice(1);