diff --git a/app/src/main/java/io/nekohasekai/sagernet/fmt/ConfigBuilder.kt b/app/src/main/java/io/nekohasekai/sagernet/fmt/ConfigBuilder.kt
index b9bc150..263898c 100644
--- a/app/src/main/java/io/nekohasekai/sagernet/fmt/ConfigBuilder.kt
+++ b/app/src/main/java/io/nekohasekai/sagernet/fmt/ConfigBuilder.kt
@@ -1,7 +1,11 @@
 package io.nekohasekai.sagernet.fmt
 
 import android.widget.Toast
-import io.nekohasekai.sagernet.*
+import io.nekohasekai.sagernet.IPv6Mode
+import io.nekohasekai.sagernet.Key
+import io.nekohasekai.sagernet.R
+import io.nekohasekai.sagernet.SagerNet
+import io.nekohasekai.sagernet.TunImplementation
 import io.nekohasekai.sagernet.bg.VpnService
 import io.nekohasekai.sagernet.database.DataStore
 import io.nekohasekai.sagernet.database.ProxyEntity
@@ -26,8 +30,30 @@ import io.nekohasekai.sagernet.fmt.wireguard.buildSingBoxOutboundWireguardBean
 import io.nekohasekai.sagernet.ktx.isIpAddress
 import io.nekohasekai.sagernet.ktx.mkPort
 import io.nekohasekai.sagernet.utils.PackageCache
-import moe.matsuri.nb4a.*
-import moe.matsuri.nb4a.SingBoxOptions.*
+import moe.matsuri.nb4a.Protocols
+import moe.matsuri.nb4a.SingBoxOptions.CacheFile
+import moe.matsuri.nb4a.SingBoxOptions.ClashAPIOptions
+import moe.matsuri.nb4a.SingBoxOptions.DNSFakeIPOptions
+import moe.matsuri.nb4a.SingBoxOptions.DNSOptions
+import moe.matsuri.nb4a.SingBoxOptions.DNSRule_DefaultOptions
+import moe.matsuri.nb4a.SingBoxOptions.DNSServerOptions
+import moe.matsuri.nb4a.SingBoxOptions.ExperimentalOptions
+import moe.matsuri.nb4a.SingBoxOptions.Inbound_DirectOptions
+import moe.matsuri.nb4a.SingBoxOptions.Inbound_MixedOptions
+import moe.matsuri.nb4a.SingBoxOptions.Inbound_TunOptions
+import moe.matsuri.nb4a.SingBoxOptions.LogOptions
+import moe.matsuri.nb4a.SingBoxOptions.MultiplexOptions
+import moe.matsuri.nb4a.SingBoxOptions.MyOptions
+import moe.matsuri.nb4a.SingBoxOptions.Outbound
+import moe.matsuri.nb4a.SingBoxOptions.Outbound_SelectorOptions
+import moe.matsuri.nb4a.SingBoxOptions.Outbound_SocksOptions
+import moe.matsuri.nb4a.SingBoxOptions.RouteOptions
+import moe.matsuri.nb4a.SingBoxOptions.RuleSet
+import moe.matsuri.nb4a.SingBoxOptions.Rule_DefaultOptions
+import moe.matsuri.nb4a.SingBoxOptionsUtil
+import moe.matsuri.nb4a.checkEmpty
+import moe.matsuri.nb4a.generateRuleSet
+import moe.matsuri.nb4a.makeSingBoxRule
 import moe.matsuri.nb4a.plugin.Plugins
 import moe.matsuri.nb4a.proxy.config.ConfigBean
 import moe.matsuri.nb4a.proxy.shadowtls.ShadowTLSBean
@@ -392,7 +418,7 @@ fun buildConfig(
                                 protocol = when (DataStore.muxType) {
                                     1 -> "smux"
                                     2 -> "yamux"
-                                    else -> "h2mux"
+                                    else -> "smux"
                                 }
                             }.asMap()
                         }