diff --git a/writer/customize.md b/writer/customize.md
index 4555f85..027ee10 100644
--- a/writer/customize.md
+++ b/writer/customize.md
@@ -10,7 +10,7 @@ The following stylesheet shows a few basic selectors you'll need in order to cus
 
 You should copy entire sections in the RECIPES section verbatim, as each is a complete customization you might want to make, like centering an image.
 
-```CSS
+```css
 /*
 
     BASICS