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 263898c..b9bc150 100644
--- a/app/src/main/java/io/nekohasekai/sagernet/fmt/ConfigBuilder.kt
+++ b/app/src/main/java/io/nekohasekai/sagernet/fmt/ConfigBuilder.kt
@@ -1,11 +1,7 @@
 package io.nekohasekai.sagernet.fmt
 
 import android.widget.Toast
-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.*
 import io.nekohasekai.sagernet.bg.VpnService
 import io.nekohasekai.sagernet.database.DataStore
 import io.nekohasekai.sagernet.database.ProxyEntity
@@ -30,30 +26,8 @@ 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.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.*
+import moe.matsuri.nb4a.SingBoxOptions.*
 import moe.matsuri.nb4a.plugin.Plugins
 import moe.matsuri.nb4a.proxy.config.ConfigBean
 import moe.matsuri.nb4a.proxy.shadowtls.ShadowTLSBean
@@ -418,7 +392,7 @@ fun buildConfig(
                                 protocol = when (DataStore.muxType) {
                                     1 -> "smux"
                                     2 -> "yamux"
-                                    else -> "smux"
+                                    else -> "h2mux"
                                 }
                             }.asMap()
                         }