diff --git a/scripts/wx_download.lua b/scripts/wx_download.lua
index 8b7b3a7..cf73439 100644
--- a/scripts/wx_download.lua
+++ b/scripts/wx_download.lua
@@ -74,7 +74,7 @@ local function get_wx_media(media_id)
         ngx.exit(resp.status)
     end
 
-    local filename = ngx.re.match(resp.headers['Content-disposition'], [[filename="(.+\.([a-zA-Z0-9])+)"]], "jo")[1]
+    local filename = ngx.re.match(resp.headers['Content-disposition'], [[filename="(.+\.([a-zA-Z0-9]+))"]], "jo")[1]
     local file_dir = ngx.var.tmp_file_dir
     local saved_file = file_dir .. "/" .. filename;
     print('saved file...' .. saved_file);
@@ -86,7 +86,7 @@ local function get_wx_media(media_id)
         file:close()
     end
 
-    return saved_file;
+    return saved_file, filename;
 end
 
 return get_wx_media;
\ No newline at end of file
diff --git a/scripts/wx_upload_to_combine.lua b/scripts/wx_upload_to_combine.lua
index 4d087dc..33db8e7 100644
--- a/scripts/wx_upload_to_combine.lua
+++ b/scripts/wx_upload_to_combine.lua
@@ -21,7 +21,8 @@ local function read_wx_file()
     local files = {}
     for i = 1, #req_body["media_ids"] do
         print("media_id -> ", i, req_body["media_ids"][i])
-        table.insert(files, get_wx_media(req_body["media_ids"][i]));
+        local _, filename = get_wx_media(req_body["media_ids"][i])
+        table.insert(files, filename);
     end
 
     create_task(files, authHeader, sudoerToken)