diff --git a/app/src/main/java/io/nekohasekai/sfa/bg/VPNService.kt b/app/src/main/java/io/nekohasekai/sfa/bg/VPNService.kt
index 9817e95..4973c70 100644
--- a/app/src/main/java/io/nekohasekai/sfa/bg/VPNService.kt
+++ b/app/src/main/java/io/nekohasekai/sfa/bg/VPNService.kt
@@ -77,7 +77,7 @@ class VPNService : VpnService(), PlatformInterfaceWrapper {
         }
 
         if (options.autoRoute) {
-            builder.addDnsServer(options.dnsServerAddress)
+            builder.addDnsServer(options.dnsServerAddress.value)
 
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
                 val inet4RouteAddress = options.inet4RouteAddress
diff --git a/app/src/main/java/io/nekohasekai/sfa/ktx/Wrappers.kt b/app/src/main/java/io/nekohasekai/sfa/ktx/Wrappers.kt
index 1fc7ad1..bd8b2f6 100644
--- a/app/src/main/java/io/nekohasekai/sfa/ktx/Wrappers.kt
+++ b/app/src/main/java/io/nekohasekai/sfa/ktx/Wrappers.kt
@@ -4,9 +4,16 @@ import android.net.IpPrefix
 import android.os.Build
 import androidx.annotation.RequiresApi
 import io.nekohasekai.libbox.RoutePrefix
+import io.nekohasekai.libbox.StringBox
 import io.nekohasekai.libbox.StringIterator
 import java.net.InetAddress
 
+val StringBox?.unwrap: String
+    get() {
+        if (this == null) return ""
+        return value
+    }
+
 fun Iterable<String>.toStringIterator(): StringIterator {
     return object : StringIterator {
         val iterator = iterator()
diff --git a/app/src/main/java/io/nekohasekai/sfa/ui/profile/EditProfileContentActivity.kt b/app/src/main/java/io/nekohasekai/sfa/ui/profile/EditProfileContentActivity.kt
index 7beacdf..df762eb 100644
--- a/app/src/main/java/io/nekohasekai/sfa/ui/profile/EditProfileContentActivity.kt
+++ b/app/src/main/java/io/nekohasekai/sfa/ui/profile/EditProfileContentActivity.kt
@@ -14,6 +14,7 @@ import io.nekohasekai.sfa.database.Profile
 import io.nekohasekai.sfa.database.ProfileManager
 import io.nekohasekai.sfa.databinding.ActivityEditProfileContentBinding
 import io.nekohasekai.sfa.ktx.errorDialogBuilder
+import io.nekohasekai.sfa.ktx.unwrap
 import io.nekohasekai.sfa.ui.shared.AbstractActivity
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.delay
@@ -84,7 +85,7 @@ class EditProfileContentActivity : AbstractActivity<ActivityEditProfileContentBi
             R.id.action_format -> {
                 lifecycleScope.launch(Dispatchers.IO) {
                     runCatching {
-                        val content = Libbox.formatConfig(binding.editor.text.toString())
+                        val content = Libbox.formatConfig(binding.editor.text.toString()).unwrap
                         if (binding.editor.text.toString() != content) {
                             withContext(Dispatchers.Main) {
                                 binding.editor.setTextContent(content)
diff --git a/app/src/main/java/io/nekohasekai/sfa/utils/HTTPClient.kt b/app/src/main/java/io/nekohasekai/sfa/utils/HTTPClient.kt
index 7223472..baab03f 100644
--- a/app/src/main/java/io/nekohasekai/sfa/utils/HTTPClient.kt
+++ b/app/src/main/java/io/nekohasekai/sfa/utils/HTTPClient.kt
@@ -2,6 +2,7 @@ package io.nekohasekai.sfa.utils
 
 import io.nekohasekai.libbox.Libbox
 import io.nekohasekai.sfa.BuildConfig
+import io.nekohasekai.sfa.ktx.unwrap
 import java.io.Closeable
 
 class HTTPClient : Closeable {
@@ -30,7 +31,7 @@ class HTTPClient : Closeable {
         request.setUserAgent(userAgent)
         request.setURL(url)
         val response = request.execute()
-        return response.contentString
+        return response.content.unwrap
     }
 
     override fun close() {