diff --git a/ftp/README.md b/ftp/README.md
index 443a3121..af99ef06 100644
--- a/ftp/README.md
+++ b/ftp/README.md
@@ -1,4 +1,8 @@
 # ftp
 :open_file_folder: ftp server and client
 
-Doesn't conform to any RFC. please email me a tutorial if you have one because that RFC pdf is chinese to me.
+:warning: This client/server doesn't conform to any RFC. please email me a tutorial if you have one because that RFC pdf is chinese to me.
+
+# todo
+
+conform to this https://www.rfc-editor.org/rfc/pdfrfc/rfc959.txt.pdf