diff --git a/SC2007.md b/SC2007.md
index 0f95760..76835ac 100644
--- a/SC2007.md
+++ b/SC2007.md
@@ -1,4 +1,4 @@
-# Use $((..)) instead of deprecated $[..]
+## Use `$((..))` instead of deprecated `$[..]`.
 
 ### Problematic code