diff --git a/Encryption.md b/Encryption.md
index d5ad7c9..f60c7ab 100644
--- a/Encryption.md
+++ b/Encryption.md
@@ -57,3 +57,5 @@ These legacy ciphers are either slow or not safe. Do not use them:
 - des-cfb
 - table
 - salsa20-ctr
+
+Notice: not all Shadowsocks versions support support every ciphers.
\ No newline at end of file