diff --git a/core/src/main/java/com/github/shadowsocks/bg/BaseService.kt b/core/src/main/java/com/github/shadowsocks/bg/BaseService.kt
index 069abc2758..d590386d4f 100644
--- a/core/src/main/java/com/github/shadowsocks/bg/BaseService.kt
+++ b/core/src/main/java/com/github/shadowsocks/bg/BaseService.kt
@@ -247,7 +247,7 @@ object BaseService {
             udpFallback?.start(this,
                     File(Core.deviceStorage.noBackupFilesDir, "stat_udp"),
                     File(configRoot, CONFIG_FILE_UDP),
-                    "-u")
+                    "-u", false)
             data.localDns = LocalDnsWorker(this::rawResolver).apply { start() }
         }
 
diff --git a/core/src/main/java/com/github/shadowsocks/bg/ProxyInstance.kt b/core/src/main/java/com/github/shadowsocks/bg/ProxyInstance.kt
index e93eef67b2..6d17ad09bb 100644
--- a/core/src/main/java/com/github/shadowsocks/bg/ProxyInstance.kt
+++ b/core/src/main/java/com/github/shadowsocks/bg/ProxyInstance.kt
@@ -110,7 +110,8 @@ class ProxyInstance(val profile: Profile, private val route: String = profile.ro
      * Sensitive shadowsocks configuration file requires extra protection. It may be stored in encrypted storage or
      * device storage, depending on which is currently available.
      */
-    fun start(service: BaseService.Interface, stat: File, configFile: File, extraFlag: String? = null) {
+    fun start(service: BaseService.Interface, stat: File, configFile: File, extraFlag: String? = null,
+              dnsRelay: Boolean = true) {
         trafficMonitor = TrafficMonitor(stat)
 
         this.configFile = configFile
@@ -130,11 +131,12 @@ class ProxyInstance(val profile: Profile, private val route: String = profile.ro
         val cmd = arrayListOf(
                 File((service as Context).applicationInfo.nativeLibraryDir, Executable.SS_LOCAL).absolutePath,
                 "--stat-path", stat.absolutePath,
-                "--dns-relay", "${DataStore.listenAddress}:${DataStore.portLocalDns}",
-                "--remote-dns", "${dns.host}:${if (dns.port < 0) 53 else dns.port}",
                 "-c", configFile.absolutePath)
         if (service.isVpnService) cmd += arrayListOf("--vpn")
         if (extraFlag != null) cmd.add(extraFlag)
+        if (dnsRelay) cmd += arrayListOf(
+                "--dns-relay", "${DataStore.listenAddress}:${DataStore.portLocalDns}",
+                "--remote-dns", "${dns.host}:${if (dns.port < 0) 53 else dns.port}")
 
         if (route != Acl.ALL) {
             cmd += "--acl"
diff --git a/plugin/src/main/java/com/github/shadowsocks/plugin/AlertDialogFragment.kt b/plugin/src/main/java/com/github/shadowsocks/plugin/AlertDialogFragment.kt
index fcf7a55807..67571adae2 100644
--- a/plugin/src/main/java/com/github/shadowsocks/plugin/AlertDialogFragment.kt
+++ b/plugin/src/main/java/com/github/shadowsocks/plugin/AlertDialogFragment.kt
@@ -41,7 +41,7 @@ abstract class AlertDialogFragment<Arg : Parcelable, Ret : Parcelable> :
     }
     protected abstract fun AlertDialog.Builder.prepare(listener: DialogInterface.OnClickListener)
 
-    protected val arg by lazy { arguments!!.getParcelable<Arg>(KEY_ARG)!! }
+    protected val arg by lazy { requireArguments().getParcelable<Arg>(KEY_ARG)!! }
     protected open fun ret(which: Int): Ret? = null
     fun withArg(arg: Arg) = apply { arguments = Bundle().apply { putParcelable(KEY_ARG, arg) } }