diff --git a/build/README.md b/build/README.md
index 5fc4ea3..5ff65d0 100644
--- a/build/README.md
+++ b/build/README.md
@@ -7,8 +7,9 @@ mv -f "build/bin/res-downloader $(jq -r '.info.productVersion' wails.json).dmg"
 
 ## Windows
 ```bash
-wails build -f -nsis -platform "windows/amd64" -webview2 Embed && mv -f "build/bin/res-downloader-amd64-installer.exe" "build/bin/res-downloader_$(jq -r '.info.productVersion' wails.json)_win_amd64.exe"
-wails build -f -nsis -platform "windows/arm64" -webview2 Embed && mv -f "build/bin/res-downloader-arm64-installer.exe" "build/bin/res-downloader_$(jq -r '.info.productVersion' wails.json)_win_arm64.exe"
+wails build -f -nsis -platform "windows/amd64" -webview2 Embed -skipbindings && mv -f "build/bin/res-downloader-amd64-installer.exe" "build/bin/res-downloader_$(jq -r '.info.productVersion' wails.json)_win_amd64.exe"
+wails build -f -nsis -platform "windows/arm64" -webview2 Embed -skipbindings && mv -f "build/bin/res-downloader-arm64-installer.exe" "build/bin/res-downloader_$(jq -r '.info.productVersion' wails.json)_win_arm64.exe"
+
 ```
 
 ## Linux
@@ -41,7 +42,7 @@ wget -O ./build/bin/appimagetool-x86_64.AppImage https://github.com/AppImage/App
 chmod +x ./build/bin/appimagetool-x86_64.AppImage
 ./build/bin/appimagetool-x86_64.AppImage build/linux/AppImage build/bin/res-downloader_$(jq -r '.info.productVersion' wails.json)_linux_amd64.AppImage
 
-cp build/bin/res-downloader build/bin/res-downloader_$(jq -r '.info.productVersion' wails.json)_linux_amd64
+mv -f build/bin/res-downloader build/bin/res-downloader_$(jq -r '.info.productVersion' wails.json)_linux_amd64
 ```
 
 > arm64
@@ -58,7 +59,7 @@ cp build/bin/res-downloader build/linux/Debian/usr/local/bin/
 echo "$(cat build/linux/Debian/DEBIAN/.control | sed -e "s/{{Version}}/$(jq -r '.info.productVersion' wails.json)/g")" > build/linux/Debian/DEBIAN/control
 dpkg-deb --build ./build/linux/Debian build/bin/res-downloader_$(jq -r '.info.productVersion' wails.json)_linux_arm64.deb
 
-cp build/bin/res-downloader build/bin/res-downloader_$(jq -r '.info.productVersion' wails.json)_linux_arm64
+mv -f build/bin/res-downloader build/bin/res-downloader_$(jq -r '.info.productVersion' wails.json)_linux_arm64
 ```
 
 ### Arch Linux 
diff --git a/core/downloader.go b/core/downloader.go
index 106f8b2..a910561 100644
--- a/core/downloader.go
+++ b/core/downloader.go
@@ -106,8 +106,6 @@ func (fd *FileDownloader) init() error {
 		fd.IsMultiPart = true
 	}
 
-	resp.Body.Close()
-
 	fd.FileName = filepath.Clean(fd.FileName)
 
 	dir := filepath.Dir(fd.FileName)
diff --git a/core/proxy.go b/core/proxy.go
index c6bf23c..ed372c9 100644
--- a/core/proxy.go
+++ b/core/proxy.go
@@ -148,12 +148,12 @@ func (p *Proxy) handleWechatRequest(r *http.Request, ctx *goproxy.ProxyCtx) (*ht
 		if !ok {
 			return
 		}
-		resourceOnce.markMu.Lock()
-		defer resourceOnce.markMu.Unlock()
+
 		urlSign := Md5(rowUrl.(string))
-		if _, ok := resourceOnce.mark[urlSign]; ok {
+		if resourceOnce.mediaIsMarked(urlSign) {
 			return
 		}
+
 		id, err := gonanoid.New()
 		if err != nil {
 			id = urlSign
@@ -214,7 +214,7 @@ func (p *Proxy) handleWechatRequest(r *http.Request, ctx *goproxy.ProxyCtx) (*ht
 
 			res.OtherData["wx_file_formats"] = strings.Join(fileFormats, "#")
 		}
-		resourceOnce.mark[urlSign] = true
+		resourceOnce.markMedia(urlSign)
 		httpServerOnce.send("newResources", res)
 	}(body)
 	return r, p.buildEmptyResponse(r)
@@ -310,14 +310,11 @@ func (p *Proxy) httpResponseEvent(resp *http.Response, ctx *goproxy.ProxyCtx) *h
 	}
 
 	rawUrl := resp.Request.URL.String()
-	resourceOnce.markMu.Lock()
-	defer resourceOnce.markMu.Unlock()
-
 	isAll, _ := resourceOnce.getResType("all")
 	isClassify, _ := resourceOnce.getResType(classify)
 
 	urlSign := Md5(rawUrl)
-	if _, ok := resourceOnce.mark[urlSign]; !ok && (isAll || isClassify) {
+	if ok := resourceOnce.mediaIsMarked(urlSign); !ok && (isAll || isClassify) {
 		value, _ := strconv.ParseFloat(resp.Header.Get("content-length"), 64)
 		id, err := gonanoid.New()
 		if err != nil {
@@ -339,7 +336,7 @@ func (p *Proxy) httpResponseEvent(resp *http.Response, ctx *goproxy.ProxyCtx) *h
 			Description: "",
 			ContentType: resp.Header.Get("Content-Type"),
 		}
-		resourceOnce.mark[urlSign] = true
+		resourceOnce.markMedia(urlSign)
 		httpServerOnce.send("newResources", res)
 	}
 	return resp
diff --git a/core/resource.go b/core/resource.go
index bfd863c..573ea20 100644
--- a/core/resource.go
+++ b/core/resource.go
@@ -26,8 +26,7 @@ type WxFileDecodeResult struct {
 }
 
 type Resource struct {
-	mark      map[string]bool
-	markMu    sync.RWMutex
+	mediaMark sync.Map
 	resType   map[string]bool
 	resTypeMu sync.RWMutex
 }
@@ -35,7 +34,6 @@ type Resource struct {
 func initResource() *Resource {
 	if resourceOnce == nil {
 		resourceOnce = &Resource{
-			mark: make(map[string]bool),
 			resType: map[string]bool{
 				"all":   true,
 				"image": true,
@@ -52,17 +50,13 @@ func initResource() *Resource {
 	return resourceOnce
 }
 
-func (r *Resource) getMark(key string) (bool, bool) {
-	r.markMu.RLock()
-	defer r.markMu.RUnlock()
-	value, ok := r.mark[key]
-	return value, ok
+func (r *Resource) mediaIsMarked(key string) bool {
+	_, loaded := r.mediaMark.Load(key)
+	return loaded
 }
 
-func (r *Resource) setMark(key string, value bool) {
-	r.markMu.Lock()
-	defer r.markMu.Unlock()
-	r.mark[key] = value
+func (r *Resource) markMedia(key string) {
+	r.mediaMark.Store(key, true)
 }
 
 func (r *Resource) getResType(key string) (bool, bool) {
@@ -93,15 +87,11 @@ func (r *Resource) setResType(n []string) {
 }
 
 func (r *Resource) clear() {
-	r.markMu.Lock()
-	defer r.markMu.Unlock()
-	r.mark = make(map[string]bool)
+	r.mediaMark.Clear()
 }
 
 func (r *Resource) delete(sign string) {
-	r.markMu.Lock()
-	defer r.markMu.Unlock()
-	delete(r.mark, sign)
+	r.mediaMark.Delete(sign)
 }
 
 func (r *Resource) download(mediaInfo MediaInfo, decodeStr string) {