diff --git a/index.js b/index.js
index df74d6126073947a34234f271a033c4d13ed02e5..833a4846989673c597500be60301a52132ebaa09 100644
--- a/index.js
+++ b/index.js
@@ -91,7 +91,7 @@ Generator.prototype.addSourceContent = function (sourceFile, sourcesContent) {
  */
 Generator.prototype.base64Encode = function () {
   var map = this.toString();
-  return new Buffer(map).toString('base64');
+  return Buffer.from(map).toString('base64');
 };
 
 /**