upload.

installer/README.md

@@ -26,6 +26,10 @@ pyinstaller -F --icon=uploader.ico dingding-cookie-uploader.py
 
 - TypeError: cafile, capath and cadata cannot be all omitted
 
+  ```
+  Upgrade websocket to 0.57.0
+  ```
+
 ## Reference
 - https://github.com/pypa/setuptools/issues/1963
 - https://stackoverflow.com/questions/57517371/matplotlibdeprecationwarning-with-pyinstaller-exe