diff --git a/lib/smsc.rb b/lib/smsc.rb
index 27dedc9..02f1e58 100644
--- a/lib/smsc.rb
+++ b/lib/smsc.rb
@@ -21,9 +21,9 @@ def message(message, phones, options = {})
         psw: @password,
         phones: phones.join(','),
         mes: message,
-        charset: @charset,
-        sender: options[:sender]
+        charset: @charset
       }
+      params.reverse_merge!(options)
 
       @connection.post '/sys/send.php', params
     end