diff --git a/src/index.html b/src/index.html
index 154f73a..ba75022 100644
--- a/src/index.html
+++ b/src/index.html
@@ -637,7 +637,7 @@
 		</svg>
 
 		<div class="alerts-container" id="js-alerts-container"></div>
-		<form style="display:none;" action="http://codepen.io/pen/define" method="POST" target="_blank" id="js-codepen-form">
+		<form style="display:none;" action="https://codepen.io/pen/define" method="POST" target="_blank" id="js-codepen-form">
 		  <input type="hidden" name="data" value='{"title": "New Pen!", "html": "<div>Hello, World!</div>"}'>
 		</form>