diff --git a/public/index.html b/public/index.html
index b8a6d8d2..3ffeac57 100644
--- a/public/index.html
+++ b/public/index.html
@@ -9,6 +9,15 @@
               crossorigin="anonymous"
               referrerpolicy="no-referrer">
       </script>
+      <% if (process.env.OPTIMIZELY_URL) { %>
+        <script
+          src="<%= process.env.OPTIMIZELY_URL %>"
+        ></script>
+      <% } else if (process.env.OPTIMIZELY_PROJECT_ID) { %>
+        <script
+          src="<%= process.env.MARKETING_SITE_BASE_URL %>/optimizelyjs/<%= process.env.OPTIMIZELY_PROJECT_ID %>.js"
+        ></script>
+      <% } %>
   </head>
   <body>
     <div id="root"></div>
