diff --git a/src/server/lib/constants.js b/src/server/lib/constants.js
index 03144f9..048f1e9 100644
--- a/src/server/lib/constants.js
+++ b/src/server/lib/constants.js
@@ -19,7 +19,7 @@ const icon = {
   LOGO: 'https://raw.githubusercontent.com/ringcentral/google-forms-notification-add-in/main/icons/logo.png',
 };
 
-const IFRAME_HOST_DOMAINS = "https://*.ringcentral.com https://*.ringcentral.biz https://*.glip.com https://*.glip.net https://glip.com https://*.labs.ringcentral.com http://*.integration.ringcentral.com http://*.devtest.ringcentral.com https://*.unifyoffice.com https://*.officeathand.att.com https://*.cloudoffice.avaya.com https://*.cloudwork.bt.com https://*.rainbowoffice.com https://*.businessconnect.telus.com https://*.vodafonebusiness.ringcentral.com";
+const IFRAME_HOST_DOMAINS = "https://*.ringcentral.com https://*.ringcentral.biz https://*.glip.com https://*.glip.net https://glip.com https://*.labs.ringcentral.com https://*.integration.ringcentral.com https://*.devtest.ringcentral.com https://*.unifyoffice.com https://*.officeathand.att.com https://*.cloudoffice.avaya.com https://*.cloudwork.bt.com https://*.rainbowoffice.com https://*.businessconnect.telus.com https://*.vodafonebusiness.ringcentral.com";
 
 exports.route = route;
 exports.icon = icon;