diff --git a/manifest.json b/manifest.json
index a395c727..1ecc41be 100644
--- a/manifest.json
+++ b/manifest.json
@@ -4,7 +4,7 @@
   "name": "NapCatQQ",
   "slug": "NapCat.Framework",
   "description": "高性能的 OneBot 11 协议实现",
-  "version": "2.4.8",
+  "version": "2.4.9",
   "icon": "./logo.png",
   "authors": [
     {
diff --git a/package.json b/package.json
index 65b9bfba..3a1d96f1 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "napcat",
   "private": true,
   "type": "module",
-  "version": "2.4.8",
+  "version": "2.4.9",
   "scripts": {
     "build:framework": "vite build --mode framework",
     "build:shell": "vite build --mode shell",
diff --git a/src/common/file.ts b/src/common/file.ts
index 502648aa..60477fce 100644
--- a/src/common/file.ts
+++ b/src/common/file.ts
@@ -128,6 +128,7 @@ export async function httpDownload(options: string | HttpDownloadOptions): Promi
     let url: string;
     let headers: Record<string, string> = {
         'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.71 Safari/537.36',
+        'referer': typeof options === 'string' ? options : options.url,
     };
     if (typeof options === 'string') {
         url = options;
diff --git a/src/common/version.ts b/src/common/version.ts
index ec01a8e5..66725915 100644
--- a/src/common/version.ts
+++ b/src/common/version.ts
@@ -1 +1 @@
-export const napCatVersion = '2.4.8';
+export const napCatVersion = '2.4.9';
diff --git a/src/core/apis/file.ts b/src/core/apis/file.ts
index 07b1537d..a3ba862c 100644
--- a/src/core/apis/file.ts
+++ b/src/core/apis/file.ts
@@ -147,7 +147,15 @@ export class NTQQFileApi {
         } catch (e) {
             logger.logError('获取视频信息失败，将使用默认值', e);
         }
-        const newFilePath = filePath + '.mp4';
+        
+        let fileExt = 'mp4'
+        try {
+            let tempExt = (await fileType.fileTypeFromFile(filePath))?.ext;
+            if (tempExt) fileExt = tempExt;
+        } catch (e) {
+            this.context.logger.logError('获取文件类型失败', e);
+        }
+        const newFilePath = filePath + '.'+fileExt;
         fs.copyFileSync(filePath, newFilePath);
         context.deleteAfterSentFiles.push(newFilePath);
         filePath = newFilePath;
diff --git a/src/webui/ui/NapCat.ts b/src/webui/ui/NapCat.ts
index 93350f8b..9d9bec4a 100644
--- a/src/webui/ui/NapCat.ts
+++ b/src/webui/ui/NapCat.ts
@@ -30,7 +30,7 @@ async function onSettingWindowCreated(view: Element) {
                 SettingItem(
                     '<span id="napcat-update-title">Napcat</span>',
                     undefined,
-                    SettingButton('V2.4.8', 'napcat-update-button', 'secondary'),
+                    SettingButton('V2.4.9', 'napcat-update-button', 'secondary'),
                 ),
             ]),
             SettingList([
diff --git a/static/assets/renderer.js b/static/assets/renderer.js
index 6fd0496a..9cb07778 100644
--- a/static/assets/renderer.js
+++ b/static/assets/renderer.js
@@ -164,7 +164,7 @@ async function onSettingWindowCreated(view) {
         SettingItem(
           '<span id="napcat-update-title">Napcat</span>',
           void 0,
-          SettingButton("V2.4.8", "napcat-update-button", "secondary")
+          SettingButton("V2.4.9", "napcat-update-button", "secondary")
         )
       ]),
       SettingList([