1 files changed, 2 insertions, 0 deletions
diff --git a/js/lib/index.js b/js/lib/index.js
index 4c5d390..4e04532 100755
--- a/js/lib/index.js
+++ b/js/lib/index.js
@@ -9,6 +9,8 @@
 // var renderer = new commonmark.HtmlRenderer();
 // console.log(renderer.render(parser.parse('Hello *world*')));
 
+"use strict";
+
 var util = require('util');
 
 var renderAST = function(tree) {