diff --git a/config.toml b/config.toml
index 74ef3c8..a23efb8 100644
--- a/config.toml
+++ b/config.toml
@@ -18,6 +18,9 @@ weight = 2
 
 [markup]
 
+[markup.asciidocExt.attributes]
+source-highlighter = "rouge"
+
 [markup.tableOfContents]
 startLevel = 2
 endLevel = 6