diff --git a/config.yml b/config.yml
index 5db8e0c..bb2f70f 100644
--- a/config.yml
+++ b/config.yml
@@ -125,8 +125,8 @@ markup:
   highlight:
     noClasses: false
     # anchorLineNos: true
-    # codeFences: true
-    # guessSyntax: true
+    codeFences: true
+    guessSyntax: true
     lineNos: true
     style: monokai