diff --git a/src/CallHandler.js b/src/CallHandler.js
index e089b48786..9b0a446565 100644
--- a/src/CallHandler.js
+++ b/src/CallHandler.js
@@ -59,6 +59,7 @@ import sdk from './index';
 import { _t } from './languageHandler';
 import Matrix from 'matrix-js-sdk';
 import dis from './dispatcher';
+import SdkConfig from './SdkConfig';
 import { showUnknownDeviceDialogForCalls } from './cryptodevices';
 import SettingsStore from "./settings/SettingsStore";
 import WidgetUtils from './utils/WidgetUtils';
@@ -474,11 +475,15 @@ async function _startCallApp(roomId, type) {
         'avatarUrl=$matrix_avatar_url',
         'email=$matrix_user_id',
     ].join('&');
-    const widgetUrl = (
-        'https://scalar.vector.im/api/widgets' +
-        '/jitsi.html?' +
-        queryString
-    );
+
+    let widgetUrl;
+    if (SdkConfig.get().integrations_jitsi_widget_url) {
+        // Try this config key. This probably isn't ideal as a way of discovering this
+        // URL, but this will at least allow the integration manager to not be hardcoded.
+        widgetUrl = SdkConfig.get().integrations_jitsi_widget_url + '?' + queryString;
+    } else {
+        widgetUrl = SdkConfig.get().integrations_rest_url + '/widgets/jitsi.html?' + queryString;
+    }
 
     const widgetData = { widgetSessionId };