diff --git a/lib/model/user_setting.dart b/lib/model/user_setting.dart
index 9c3dbe6..d3daf38 100644
--- a/lib/model/user_setting.dart
+++ b/lib/model/user_setting.dart
@@ -17,7 +17,7 @@ class Setting {
       this.host,
       this.path,
       this.nodeId,
-      this.lambdaServer,
+      this.lambdaServer = "https://lnlambda.lnmetrics.info",
       this.rune}) {
     clientMode = ClientProvider.getClientByDefPlatform().first;
   }
diff --git a/lib/views/setting/lnlambda_setting_view.dart b/lib/views/setting/lnlambda_setting_view.dart
index 94ffc31..8b63c39 100644
--- a/lib/views/setting/lnlambda_setting_view.dart
+++ b/lib/views/setting/lnlambda_setting_view.dart
@@ -41,7 +41,7 @@ class _LnlambdaSettingViewState extends State<LnlambdaSettingView> {
           ),
           const Text("Lambda Server"),
           TextFormField(
-            controller: TextEditingController(text: setting.lambdaServer ?? ''),
+            controller: TextEditingController(text: setting.lambdaServer),
             onChanged: (text) {
               setting.lambdaServer = text;
             },