diff --git a/src/js/simplemde.js b/src/js/simplemde.js
index 5cbbe41..aa18c17 100644
--- a/src/js/simplemde.js
+++ b/src/js/simplemde.js
@@ -8,7 +8,7 @@ require("codemirror/mode/markdown/markdown.js");
 require("codemirror/addon/mode/overlay.js");
 require("codemirror/mode/xml/xml.js");
 require("marked");
-require("codemirror-spell-checker/src/js/spell-checker.js");
+//require("codemirror-spell-checker/src/js/spell-checker.js"); //todo module must support CommonJS
 require("codemirror-spell-checker/src/js/typo.js");
 
 var isMac = /Mac/.test(navigator.platform);