diff --git a/demo/index.html b/demo/index.html
index 4d5149f3..65408fd7 100644
--- a/demo/index.html
+++ b/demo/index.html
@@ -13,7 +13,7 @@
     <div id="terminal-container"></div>
     <div>
       <h3>Options</h3>
-      <p>These options can be set in the <code>Terminal</code> constructor or using the <code>Terminal.setOption</code> function.</p>
+      <p>These options can be set in the <code>Terminal</code> constructor or by using the <code>Terminal.setOption</code> function.</p>
       <div id="options-container"></div>
     </div>
     <div>