diff --git a/chapters/00_intro.md b/chapters/00_intro.md
index 117dc3f..7720709 100644
--- a/chapters/00_intro.md
+++ b/chapters/00_intro.md
@@ -1,6 +1,6 @@
 ## Coding contingencies
 
-```
+```note
 TODO:
 -   how to quote propperly an introduction from a book series? (software studies)
 -   find where to put code documentation & developers paragraphs