diff --git a/SC2021.md b/SC2021.md
index 68f0f1b..fd3ef06 100644
--- a/SC2021.md
+++ b/SC2021.md
@@ -1,4 +1,4 @@
-## Don't use [] around ranges in tr, it replaces literal square brackets.
+## Don't use `[]` around ranges in `tr`, it replaces literal square brackets.
 
 ### Problematic code: