diff --git a/app/src/main/java/org/itxtech/daedalus/provider/HttpsProvider.java b/app/src/main/java/org/itxtech/daedalus/provider/HttpsProvider.java
index e3fed27..b9b7a80 100644
--- a/app/src/main/java/org/itxtech/daedalus/provider/HttpsProvider.java
+++ b/app/src/main/java/org/itxtech/daedalus/provider/HttpsProvider.java
@@ -45,13 +45,13 @@ abstract public class HttpsProvider extends Provider {
 
     private static final String TAG = "HttpsProvider";
 
-    protected final WhqList whqList = new WhqList();
+    final WhqList whqList = new WhqList();
 
-    public HttpsProvider(ParcelFileDescriptor descriptor, DaedalusVpnService service) {
+    HttpsProvider(ParcelFileDescriptor descriptor, DaedalusVpnService service) {
         super(descriptor, service);
     }
 
-    protected OkHttpClient getHttpClient(String accept) {
+    OkHttpClient getHttpClient(String accept) {
         return new OkHttpClient.Builder()
                 .connectTimeout(10, TimeUnit.SECONDS)
                 .readTimeout(10, TimeUnit.SECONDS)
diff --git a/app/src/main/java/org/itxtech/daedalus/service/DaedalusVpnService.java b/app/src/main/java/org/itxtech/daedalus/service/DaedalusVpnService.java
index b1ec42b..62af8b8 100644
--- a/app/src/main/java/org/itxtech/daedalus/service/DaedalusVpnService.java
+++ b/app/src/main/java/org/itxtech/daedalus/service/DaedalusVpnService.java
@@ -28,8 +28,8 @@
 import java.net.Inet6Address;
 import java.net.InetAddress;
 import java.net.UnknownHostException;
+import java.util.ArrayList;
 import java.util.HashMap;
-import java.util.Set;
 
 /**
  * Daedalus Project
@@ -126,6 +126,7 @@ public int onStartCommand(Intent intent, int flags, int startId) {
                         this.notification = builder;
                     }
 
+                    DNSServerHelper.buildCache();
                     Daedalus.initRuleResolver();
 
                     if (this.mThread == null) {
@@ -234,7 +235,6 @@ private InetAddress addDnsServer(Builder builder, String format, byte[] ipv6Temp
     @Override
     public void run() {
         try {
-            DNSServerHelper.buildCache();
             Builder builder = new Builder()
                     .setSession("Daedalus")
                     .setConfigureIntent(PendingIntent.getActivity(this, 0,
@@ -242,9 +242,9 @@ public void run() {
                             PendingIntent.FLAG_ONE_SHOT));
 
             //Set App Filter
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP && Daedalus.getPrefs().getBoolean("settings_app_filter_switch", false)) {
-                Set<String> apps = Daedalus.getPrefs().getStringSet("filterAppObjects", null);
-                if (apps != null) {
+            if (Daedalus.getPrefs().getBoolean("settings_app_filter_switch", false)) {
+                ArrayList<String> apps = Daedalus.configurations.getAppObjects();
+                if (apps.size() > 0) {
                     boolean mode = Daedalus.getPrefs().getBoolean("settings_app_filter_mode_switch", false);
                     for (String app : apps) {
                         try {