diff --git a/android/app/src/main/kotlin/com/hiddify/hiddify/Settings.kt b/android/app/src/main/kotlin/com/hiddify/hiddify/Settings.kt
index c841ddeff..62e2743a5 100644
--- a/android/app/src/main/kotlin/com/hiddify/hiddify/Settings.kt
+++ b/android/app/src/main/kotlin/com/hiddify/hiddify/Settings.kt
@@ -12,7 +12,6 @@ import java.io.ByteArrayInputStream
 import java.io.File
 import java.io.ObjectInputStream
 
-
 object Settings {
 
     private val preferences by lazy {
@@ -67,9 +66,6 @@ object Settings {
         get() = preferences.getBoolean(SettingsKey.DEBUG_MODE, false)
         set(value) = preferences.edit().putBoolean(SettingsKey.DEBUG_MODE, value).apply()
 
-    val enableTun: Boolean
-        get() = preferences.getBoolean(SettingsKey.ENABLE_TUN, true)
-
     var disableMemoryLimit: Boolean
         get() = preferences.getBoolean(SettingsKey.DISABLE_MEMORY_LIMIT, false)
         set(value) =
@@ -112,7 +108,7 @@ object Settings {
     }
 
     private suspend fun needVPNService(): Boolean {
-        if (enableTun) return true
+        if (serviceMode == ServiceMode.VPN) return true
         val filePath = activeConfigPath
         if (filePath.isBlank()) return false
         val content = JSONObject(File(filePath).readText())
diff --git a/android/app/src/main/kotlin/com/hiddify/hiddify/constant/ServiceMode.kt b/android/app/src/main/kotlin/com/hiddify/hiddify/constant/ServiceMode.kt
index 3a0fc4873..f86de8a10 100644
--- a/android/app/src/main/kotlin/com/hiddify/hiddify/constant/ServiceMode.kt
+++ b/android/app/src/main/kotlin/com/hiddify/hiddify/constant/ServiceMode.kt
@@ -1,6 +1,6 @@
 package com.hiddify.hiddify.constant
 
 object ServiceMode {
-    const val NORMAL = "normal"
+    const val NORMAL = "proxy"
     const val VPN = "vpn"
 }
\ No newline at end of file
diff --git a/android/app/src/main/kotlin/com/hiddify/hiddify/constant/SettingsKey.kt b/android/app/src/main/kotlin/com/hiddify/hiddify/constant/SettingsKey.kt
index 96782ad83..c331b5dad 100644
--- a/android/app/src/main/kotlin/com/hiddify/hiddify/constant/SettingsKey.kt
+++ b/android/app/src/main/kotlin/com/hiddify/hiddify/constant/SettingsKey.kt
@@ -3,18 +3,15 @@ package com.hiddify.hiddify.constant
 object SettingsKey {
     private const val KEY_PREFIX = "flutter."
 
+    const val SERVICE_MODE = "${KEY_PREFIX}service-mode"
     const val ACTIVE_CONFIG_PATH = "${KEY_PREFIX}active_config_path"
     const val ACTIVE_PROFILE_NAME = "${KEY_PREFIX}active_profile_name"
-    const val SERVICE_MODE = "${KEY_PREFIX}service_mode"
-
-    const val CONFIG_OPTIONS = "config_options_json"
 
     const val PER_APP_PROXY_MODE = "${KEY_PREFIX}per_app_proxy_mode"
     const val PER_APP_PROXY_INCLUDE_LIST = "${KEY_PREFIX}per_app_proxy_include_list"
     const val PER_APP_PROXY_EXCLUDE_LIST = "${KEY_PREFIX}per_app_proxy_exclude_list"
 
     const val DEBUG_MODE = "${KEY_PREFIX}debug_mode"
-    const val ENABLE_TUN = "${KEY_PREFIX}enable-tun"
     const val DISABLE_MEMORY_LIMIT = "${KEY_PREFIX}disable_memory_limit"
     const val DYNAMIC_NOTIFICATION = "${KEY_PREFIX}dynamic_notification"
     const val SYSTEM_PROXY_ENABLED = "${KEY_PREFIX}system_proxy_enabled"
@@ -22,5 +19,6 @@ object SettingsKey {
     // cache
 
     const val STARTED_BY_USER = "${KEY_PREFIX}started_by_user"
+    const val CONFIG_OPTIONS = "config_options_json"
 
 }
\ No newline at end of file
diff --git a/lib/core/preferences/preferences_migration.dart b/lib/core/preferences/preferences_migration.dart
index c02b108a4..ec0d63d96 100644
--- a/lib/core/preferences/preferences_migration.dart
+++ b/lib/core/preferences/preferences_migration.dart
@@ -48,6 +48,20 @@ class PreferencesVersion1Migration extends PreferencesMigrationStep
 
   @override
   Future<void> migrate() async {
+    if (sharedPreferences.getString("service-mode")
+        case final String serviceMode) {
+      final newMode = switch (serviceMode) {
+        "proxy" || "system-proxy" || "vpn" => serviceMode,
+        "systemProxy" => "system-proxy",
+        "tun" => "vpn",
+        _ => PlatformUtils.isDesktop ? "system-proxy" : "vpn",
+      };
+      loggy.debug(
+        "changing service-mode from [$serviceMode] to [$newMode]",
+      );
+      await sharedPreferences.setString("service-mode", newMode);
+    }
+
     if (sharedPreferences.getString("ipv6-mode") case final String ipv6Mode) {
       loggy.debug(
         "changing ipv6-mode from [$ipv6Mode] to [${_ipv6Mapper(ipv6Mode)}]",
diff --git a/lib/singbox/model/singbox_config_enum.dart b/lib/singbox/model/singbox_config_enum.dart
index a7da0a569..67f7be47e 100644
--- a/lib/singbox/model/singbox_config_enum.dart
+++ b/lib/singbox/model/singbox_config_enum.dart
@@ -2,10 +2,15 @@ import 'package:hiddify/core/localization/translations.dart';
 import 'package:hiddify/utils/platform_utils.dart';
 import 'package:json_annotation/json_annotation.dart';
 
+@JsonEnum(valueField: 'key')
 enum ServiceMode {
-  proxy,
-  systemProxy,
-  tun;
+  proxy("proxy"),
+  systemProxy("system-proxy"),
+  tun("vpn");
+
+  const ServiceMode(this.key);
+
+  final String key;
 
   static ServiceMode get defaultMode =>
       PlatformUtils.isDesktop ? systemProxy : tun;