diff --git a/docs/index.asciidoc b/docs/index.asciidoc
index 7e67c7c..5bf0f5b 100644
--- a/docs/index.asciidoc
+++ b/docs/index.asciidoc
@@ -53,7 +53,7 @@ Then with this logstash config:
     }
     output {
       stdout {
-        debug => true
+        codec => rubydebug
       }
     }
 
@@ -124,4 +124,4 @@ The path to the sqlite database file.
 [id="plugins-{type}s-{plugin}-common-options"]
 include::{include_path}/{type}.asciidoc[]
 
-:default_codec!:
\ No newline at end of file
+:default_codec!: