diff --git a/client/app/scripts/utils/web-api-utils.js b/client/app/scripts/utils/web-api-utils.js
index 1fc606694..0d0e8e85a 100644
--- a/client/app/scripts/utils/web-api-utils.js
+++ b/client/app/scripts/utils/web-api-utils.js
@@ -63,7 +63,7 @@ export function basePathSlash(urlPath) {
 let apiPath;
 let websocketUrl;
 const isIframe = window.location !== window.parent.location;
-const isStandalone = window.location.pathname === '/';
+const isStandalone = window.location.pathname === '/' || /\/(.+).html/.test(window.location.pathname);
 const wsProto = location.protocol === 'https:' ? 'wss' : 'ws';
 
 if (isIframe || isStandalone) {