diff --git a/next/assets/assets.go b/next/assets/assets.go
index e0e8252..d127ae0 100644
--- a/next/assets/assets.go
+++ b/next/assets/assets.go
@@ -1,13 +1,49 @@
 package assets
 
-import "XProxy/next/logger"
+import (
+	"XProxy/next/logger"
+	"os"
+)
+
+func updateRemoteAsset(file string, url string, proxy string) error {
+	logger.Debugf("Start downloading remote asset `%s` to `%s`", url, file)
+	asset, date, err := download(url, proxy)
+	if err != nil {
+		logger.Errorf("Failed to download remote asset `%s`", url)
+		return err
+	}
+	asset, err = tryExtract(asset)
+
+	fp, err := os.OpenFile(file, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
+	if err != nil {
+		logger.Errorf("Failed to open file `%s` -> %v", file, err)
+		return err
+	}
+	defer fp.Close()
+	_, err = fp.Write(asset)
+	if err != nil {
+		logger.Errorf("Failed to save file `%s` -> %v", file, err)
+		return err
+	}
+
+	if err := os.Chtimes(file, *date, *date); err != nil {
+		logger.Warnf("Failed to change asset modification time")
+	} else {
+		logger.Debugf("Change `%s` modification time to `%v`", file, date)
+	}
+	logger.Infof("Successfully obtained remote asset `%s`", file)
+	return nil
+}
 
 func Demo() {
 	//raw, t, _ := download("https://github.com/Loyalsoldier/v2ray-rules-dat/releases/download/202309082208/geosite.dat", "")
 	//raw, t, _ := download("https://cdn.dnomd343.top/v2ray-rules-dat/geosite.dat", "")
 	//raw, t, _ := download("https://cdn.dnomd343.top/v2ray-rules-dat/geosite.dat", "socks5://192.168.2.2:1084")
-	raw, t, _ := download("https://cdn.dnomd343.top/v2ray-rules-dat/geosite.dat.xz", "")
-	logger.Infof("%v", t)
-	ret, _ := tryExtract(raw)
-	logger.Debugf("content size -> %d", len(ret))
+	//raw, t, _ := download("https://cdn.dnomd343.top/v2ray-rules-dat/geosite.dat.xz", "")
+	//logger.Infof("%v", t)
+	//ret, _ := tryExtract(raw)
+	//logger.Debugf("content size -> %d", len(ret))
+
+	updateRemoteAsset("geosite.dat", "http://cdn.dnomd343.top/v2ray-rules-dat/geosite.dat.xz", "")
+
 }
diff --git a/next/assets/remote.go b/next/assets/remote.go
index 0205021..62f3c41 100644
--- a/next/assets/remote.go
+++ b/next/assets/remote.go
@@ -3,6 +3,7 @@ package assets
 import (
 	"XProxy/next/logger"
 	"bytes"
+	"errors"
 	"github.com/andybalholm/brotli"
 	"github.com/go-http-utils/headers"
 	"github.com/klauspost/compress/flate"
@@ -114,6 +115,10 @@ func download(url string, proxy string) ([]byte, *time.Time, error) {
 		return nil, nil, err
 	}
 	defer resp.Body.Close()
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		logger.Errorf("Download `%s` with http status code -> %d", url, resp.StatusCode)
+		return nil, nil, errors.New("http status code non-2xx")
+	}
 	logger.Debugf("Remote data downloaded successfully")
 
 	var content []byte