diff --git a/app/src/main/java/org/schabi/newpipe/download/MainActivity.java b/app/src/main/java/org/schabi/newpipe/download/MainActivity.java
index 1ea6d2024..60b64b1bf 100644
--- a/app/src/main/java/org/schabi/newpipe/download/MainActivity.java
+++ b/app/src/main/java/org/schabi/newpipe/download/MainActivity.java
@@ -10,6 +10,7 @@ import android.content.ServiceConnection;
 import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.os.IBinder;
+import android.preference.PreferenceManager;
 import android.support.v4.app.NavUtils;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatActivity;
@@ -95,8 +96,7 @@ public class MainActivity extends AppCompatActivity implements AdapterView.OnIte
         actionBar.setTitle(R.string.downloads_title);
         actionBar.setDisplayShowTitleEnabled(true);
 
-        //todo: this needs to be fixed Context.MODE_WORLD_READABLE is obsolet
-        mPrefs = getSharedPreferences(THREADS, Context.MODE_WORLD_READABLE);
+        mPrefs = PreferenceManager.getDefaultSharedPreferences(this);
 
         // Fragment
         getWindow().getDecorView().getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
diff --git a/app/src/main/java/us/shandian/giga/ui/fragment/MissionsFragment.java b/app/src/main/java/us/shandian/giga/ui/fragment/MissionsFragment.java
index c8f0d2fbf..d25f12d65 100644
--- a/app/src/main/java/us/shandian/giga/ui/fragment/MissionsFragment.java
+++ b/app/src/main/java/us/shandian/giga/ui/fragment/MissionsFragment.java
@@ -9,6 +9,7 @@ import android.content.ServiceConnection;
 import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.os.IBinder;
+import android.preference.PreferenceManager;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuItem;
@@ -61,8 +62,8 @@ public abstract class MissionsFragment extends Fragment
 	@Override
 	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
 		View v = inflater.inflate(R.layout.missions, container, false);
-		
-		mPrefs = getActivity().getSharedPreferences("mode", Context.MODE_WORLD_READABLE);
+
+		mPrefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
 		mLinear = mPrefs.getBoolean("linear", false);
 		
 		// Bind the service