diff --git a/docs/config.yaml b/docs/config.yaml
index 57418818..b59e7413 100644
--- a/docs/config.yaml
+++ b/docs/config.yaml
@@ -543,7 +543,7 @@ proxies: # socks5
     plugin: kcptun
     plugin-opts:
       key: it's a secrect # pre-shared secret between client and server
-      crypt: aes # aes, aes-128, aes-192, salsa20, blowfish, twofish, cast5, 3des, tea, xtea, xor, sm4, none, null
+      crypt: aes # aes, aes-128, aes-192, salsa20, blowfish, twofish, cast5, 3des, tea, xtea, xor, none, null
       mode: fast # profiles: fast3, fast2, fast, normal, manual
       conn: 1 # set num of UDP connections to server
       autoexpire: 0 # set auto expiration time(in seconds) for a single UDP connection, 0 to disable
@@ -1370,7 +1370,7 @@ listeners:
     # kcp-tun:
     #   enable: false
     #   key: it's a secrect # pre-shared secret between client and server
-    #   crypt: aes # aes, aes-128, aes-192, salsa20, blowfish, twofish, cast5, 3des, tea, xtea, xor, sm4, none, null
+    #   crypt: aes # aes, aes-128, aes-192, salsa20, blowfish, twofish, cast5, 3des, tea, xtea, xor, none, null
     #   mode: fast # profiles: fast3, fast2, fast, normal, manual
     #   conn: 1 # set num of UDP connections to server
     #   autoexpire: 0 # set auto expiration time(in seconds) for a single UDP connection, 0 to disable