diff --git a/nodejs/config.js.example b/nodejs/config.js.example
index 0af3a11..ad222f0 100644
--- a/nodejs/config.js.example
+++ b/nodejs/config.js.example
@@ -5,4 +5,6 @@ config.mysql_user       = 'user';
 config.mysql_secret     = 'password';
 config.mysql_database   = 'autohome';
 
+config.crypto_secret    = 'crypto secret key';
+
 module.exports = config;
\ No newline at end of file