diff --git a/web/collector/Light9CollectorUi.ts b/web/collector/Light9CollectorUi.ts
--- a/web/collector/Light9CollectorUi.ts
+++ b/web/collector/Light9CollectorUi.ts
@@ -34,7 +34,7 @@ export class Light9CollectorUi extends L
       this.graph.runHandler(this.findDevices.bind(this), "findDevices");
     });
 
-    const ws = new ReconnectingWebSocket(location.href.replace("http", "ws") + "../service/collector/updates");
+    const ws = new ReconnectingWebSocket("ws://localhost:8200/service/collector/updates");
     ws.addEventListener("message", (ev: any) => {
       const outputAttrsSet = JSON.parse(ev.data).outputAttrsSet;
       if (outputAttrsSet) {