diff --git a/plugins/dify/main.py b/plugins/dify/main.py
index 0c42c7a..156cdd7 100644
--- a/plugins/dify/main.py
+++ b/plugins/dify/main.py
@@ -472,7 +472,7 @@ class DifyPlugin(MessagePluginInterface):
 
         # 准备请求数据
         data = {
-            "sys.files": files,
+            "files": files,
             "user": user_id,
             "inputs": inputs_params,
             "response_mode": "blocking"  # 使用阻塞响应模式