diff --git a/src/course-home/outline-tab/LmsHtmlFragment.jsx b/src/course-home/outline-tab/LmsHtmlFragment.jsx
index 778e7d79d8..b27c564ec0 100644
--- a/src/course-home/outline-tab/LmsHtmlFragment.jsx
+++ b/src/course-home/outline-tab/LmsHtmlFragment.jsx
@@ -15,7 +15,7 @@ const LmsHtmlFragment = ({
       <head>
         <base href="${getConfig().LMS_BASE_URL}" target="_parent">
         <link rel="stylesheet" href="/static/${getConfig().LEGACY_THEME_NAME ? `${getConfig().LEGACY_THEME_NAME}/` : ''}css/bootstrap/lms-main.css">
-        <link rel="stylesheet" type="text/css" href="${getConfig().BASE_URL}/static/LmsHtmlFragment.css">
+        <link rel="stylesheet" type="text/css" href="//${getConfig().BASE_URL}/static/LmsHtmlFragment.css">
       </head>
       <body class="${className}">${html}</body>
       <script>
