diff --git a/service/src/main/java/com/github/kr328/clash/service/BaseService.kt b/service/src/main/java/com/github/kr328/clash/service/BaseService.kt
index 8fe94c6..ad69d2a 100644
--- a/service/src/main/java/com/github/kr328/clash/service/BaseService.kt
+++ b/service/src/main/java/com/github/kr328/clash/service/BaseService.kt
@@ -5,10 +5,10 @@ import android.content.Context
 import com.github.kr328.clash.common.utils.createLanguageConfigurationContext
 import com.github.kr328.clash.service.settings.ServiceSettings
 import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.MainScope
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.cancel
 
-abstract class BaseService : Service(), CoroutineScope by MainScope() {
+abstract class BaseService : Service(), CoroutineScope by CoroutineScope(Dispatchers.Default) {
     lateinit var settings: ServiceSettings
 
     override fun attachBaseContext(base: Context?) {
diff --git a/service/src/main/java/com/github/kr328/clash/service/ClashManager.kt b/service/src/main/java/com/github/kr328/clash/service/ClashManager.kt
index 46d4236..0040c9c 100644
--- a/service/src/main/java/com/github/kr328/clash/service/ClashManager.kt
+++ b/service/src/main/java/com/github/kr328/clash/service/ClashManager.kt
@@ -8,12 +8,9 @@ import com.github.kr328.clash.service.data.SelectedProxyDao
 import com.github.kr328.clash.service.data.SelectedProxyEntity
 import com.github.kr328.clash.service.transact.IStreamCallback
 import com.github.kr328.clash.service.transact.ParcelableContainer
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.launch
-
-class ClashManager(parent: CoroutineScope) :
-    IClashManager.Stub(), CoroutineScope by parent {
+import kotlinx.coroutines.runBlocking
 
+class ClashManager: IClashManager.Stub() {
     override fun setProxyMode(mode: String?) {
         Clash.setProxyMode(requireNotNull(mode))
     }
@@ -29,8 +26,8 @@ class ClashManager(parent: CoroutineScope) :
     override fun setSelector(proxy: String?, selected: String?) {
         require(proxy != null && selected != null)
 
-        launch {
-            val current = ProfileDao.queryActive() ?: return@launch
+        runBlocking {
+            val current = ProfileDao.queryActive() ?: return@runBlocking
 
             SelectedProxyDao.setSelectedForProfile(SelectedProxyEntity(current.id, proxy, selected))
         }
diff --git a/service/src/main/java/com/github/kr328/clash/service/ClashManagerService.kt b/service/src/main/java/com/github/kr328/clash/service/ClashManagerService.kt
index 32e921e..a4c92eb 100644
--- a/service/src/main/java/com/github/kr328/clash/service/ClashManagerService.kt
+++ b/service/src/main/java/com/github/kr328/clash/service/ClashManagerService.kt
@@ -5,6 +5,6 @@ import android.os.IBinder
 
 class ClashManagerService : BaseService() {
     override fun onBind(intent: Intent?): IBinder? {
-        return ClashManager(this)
+        return ClashManager()
     }
 }
\ No newline at end of file
diff --git a/service/src/main/java/com/github/kr328/clash/service/ClashService.kt b/service/src/main/java/com/github/kr328/clash/service/ClashService.kt
index cea8fc7..28ac0a7 100644
--- a/service/src/main/java/com/github/kr328/clash/service/ClashService.kt
+++ b/service/src/main/java/com/github/kr328/clash/service/ClashService.kt
@@ -4,7 +4,10 @@ import android.content.Intent
 import android.os.Binder
 import android.os.IBinder
 import com.github.kr328.clash.service.clash.ClashRuntime
-import com.github.kr328.clash.service.clash.module.*
+import com.github.kr328.clash.service.clash.module.CloseModule
+import com.github.kr328.clash.service.clash.module.DynamicNotificationModule
+import com.github.kr328.clash.service.clash.module.ReloadModule
+import com.github.kr328.clash.service.clash.module.StaticNotificationModule
 import com.github.kr328.clash.service.settings.ServiceSettings
 import com.github.kr328.clash.service.util.broadcastClashStarted
 import com.github.kr328.clash.service.util.broadcastClashStopped
diff --git a/service/src/main/java/com/github/kr328/clash/service/ProfileProcessor.kt b/service/src/main/java/com/github/kr328/clash/service/ProfileProcessor.kt
index 67c1c28..f7c833c 100644
--- a/service/src/main/java/com/github/kr328/clash/service/ProfileProcessor.kt
+++ b/service/src/main/java/com/github/kr328/clash/service/ProfileProcessor.kt
@@ -4,7 +4,6 @@ import android.content.Context
 import android.content.Intent
 import android.net.Uri
 import android.webkit.URLUtil
-import com.github.kr328.clash.common.utils.Log
 import com.github.kr328.clash.core.Clash
 import com.github.kr328.clash.service.data.ProfileDao
 import com.github.kr328.clash.service.model.Profile
@@ -17,8 +16,6 @@ import kotlinx.coroutines.future.await
 import kotlinx.coroutines.withContext
 import java.io.File
 import java.io.FileNotFoundException
-import java.lang.Exception
-import java.lang.NullPointerException
 import java.util.*
 
 object ProfileProcessor {
diff --git a/service/src/main/java/com/github/kr328/clash/service/TunService.kt b/service/src/main/java/com/github/kr328/clash/service/TunService.kt
index a0ef99b..0258fa9 100644
--- a/service/src/main/java/com/github/kr328/clash/service/TunService.kt
+++ b/service/src/main/java/com/github/kr328/clash/service/TunService.kt
@@ -7,11 +7,11 @@ import com.github.kr328.clash.service.clash.module.*
 import com.github.kr328.clash.service.settings.ServiceSettings
 import com.github.kr328.clash.service.util.*
 import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.MainScope
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.cancel
 import kotlinx.coroutines.launch
 
-class TunService : VpnService(), CoroutineScope by MainScope() {
+class TunService : VpnService(), CoroutineScope by CoroutineScope(Dispatchers.Default) {
     companion object {
         // from https://github.com/shadowsocks/shadowsocks-android/blob/master/core/src/main/java/com/github/shadowsocks/bg/VpnService.kt
         private const val VPN_MTU = 9000
diff --git a/service/src/main/java/com/github/kr328/clash/service/clash/module/TunModule.kt b/service/src/main/java/com/github/kr328/clash/service/clash/module/TunModule.kt
index 9f7bb32..7826fa8 100644
--- a/service/src/main/java/com/github/kr328/clash/service/clash/module/TunModule.kt
+++ b/service/src/main/java/com/github/kr328/clash/service/clash/module/TunModule.kt
@@ -9,7 +9,6 @@ import com.github.kr328.clash.core.Clash
 import com.github.kr328.clash.service.util.parseCIDR
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
-import java.lang.NullPointerException
 
 class TunModule(private val service: VpnService) : Module() {
     interface Configure {