diff --git a/index.html b/index.html
index 874fdf5bd..4b4bc8694 100644
--- a/index.html
+++ b/index.html
@@ -225,7 +225,7 @@ <h2>Options</h2>
   </div>
 
   <div class="editor">
-    <textarea id="source"></textarea>
+    <textarea id="source" spellcheck="false"></textarea>
   </div>
 
   <div class="hide">