diff --git a/20_Day_Writing_clean_codes/20_day_writing_clean_codes.md b/20_Day_Writing_clean_codes/20_day_writing_clean_codes.md
index 8579b6b6a..9f4f7f7c8 100644
--- a/20_Day_Writing_clean_codes/20_day_writing_clean_codes.md
+++ b/20_Day_Writing_clean_codes/20_day_writing_clean_codes.md
@@ -330,7 +330,7 @@ isRaining
 
 #### Classes
 
-We declare class with CamelCase which starts with capital letter.
+We declare class with PascalCase which starts with capital letter.
 
 ```js
 // syntax