example.conf in fluent-plugin-slack-0.6.5 vs example.conf in fluent-plugin-slack-0.6.6

@@ -1,10 +1,10 @@
 <source>
-  type forward
+  @type forward
 </source>
 
 <match tag> 
-  type slack
+  @type slack
   token "#{ENV['TOKEN']}"
   username fluentd
   color good
   icon_emoji :ghost: # if you want to use icon_url, delete this param.
   #icon_url http://www.google.com/s2/favicons?domain=www.google.de