diff --git a/background/main.go b/background/main.go
index 6e67c8f..0721a57 100644
--- a/background/main.go
+++ b/background/main.go
@@ -70,11 +70,8 @@ func loadApps() {
 	}
 }
 
-// 保存apps数据
+// 保存apps数据（调用者需要持有锁）
 func saveApps() error {
-	appsMutex.Lock()
-	defer appsMutex.Unlock()
-
 	file, err := os.Create(jsonFile)
 	if err != nil {
 		return fmt.Errorf("failed to create apps.json: %w", err)
@@ -129,7 +126,7 @@ func main() {
 	{
 		api.GET("/apps", getApps)
 		api.POST("/apps", uploadApp)
-		api.DELETE("/apps/:id", deleteApp)  // 添加删除应用的API端点
+		api.DELETE("/apps/:id", deleteApp) // 添加删除应用的API端点
 		api.GET("/apps/:id", downloadApp)
 		api.GET("/apps/:id/", downloadApp) // 处理以/结尾的URL
 		api.GET("/docs", getDocs)          // 新增获取文档的API端点
@@ -223,13 +220,13 @@ func uploadApp(c *gin.Context) {
 
 	appsMutex.Lock()
 	apps = append(apps, newApp)
-	appsMutex.Unlock()
-
 	// 保存到文件
 	if err := saveApps(); err != nil {
+		appsMutex.Unlock()
 		c.JSON(http.StatusInternalServerError, gin.H{"success": false, "message": "保存数据失败: " + err.Error()})
 		return
 	}
+	appsMutex.Unlock()
 
 	c.JSON(http.StatusOK, gin.H{"success": true})
 }
@@ -308,13 +305,13 @@ func deleteApp(c *gin.Context) {
 	// 从apps切片中删除该应用
 	appsMutex.Lock()
 	apps = append(apps[:targetIndex], apps[targetIndex+1:]...)
-	appsMutex.Unlock()
-
 	// 保存到文件
 	if err := saveApps(); err != nil {
+		appsMutex.Unlock()
 		c.JSON(http.StatusInternalServerError, gin.H{"success": false, "message": "保存数据失败: " + err.Error()})
 		return
 	}
+	appsMutex.Unlock()
 
 	c.JSON(http.StatusOK, gin.H{"success": true, "message": "删除成功"})
 }