How to load Facebook cover photo via graphRequest with a higher resolution? [Android | Facebook v2.3]

I am writing an Android app where I need the user to log in with Facebook.

Login works fine and I also get a profile picture, but the resolution of the picture is very low - about 50 px x 50 px. Is there a possibility to get a better one?

The following code is used to load the image, after the Facebook login process and a GraphRequest.newMeRequest.

public class LoadFacebookUserPicture extends AsyncTask<String, Void, Bitmap> {

    private Context context;

    public LoadFacebookUserPicture (Context context) {
        this.context = context;
    }

    @Override
    protected Bitmap doInBackground(String... params) {
        try {
            URL url = new URL(params[0]);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setDoInput(true);
            connection.connect();
            InputStream input = connection.getInputStream();
            Bitmap myBitmap = BitmapFactory.decodeStream(input);
            FileOutputStream fos = context.openFileOutput("test.png", Context.MODE_PRIVATE);
            myBitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);
            fos.close();
            return null;
        } catch (Exception e) {
            e.printStackTrace();
            Log.e("LoadFacebookUserPicture", e.getMessage());
        }
        Log.e("LoadFacebookUserPicture", "Passt");
        return null;
    }

}