diff --git a/1-js/05-data-types/02-number/article.md b/1-js/05-data-types/02-number/article.md
index 3de2fc6a..ebcd1729 100644
--- a/1-js/05-data-types/02-number/article.md
+++ b/1-js/05-data-types/02-number/article.md
@@ -16,7 +16,7 @@ Imagine we need to write 1 billion. The obvious way is:
 let billion = 1000000000;
 ```
 
-We also can use underscope `_` as the separator:
+We also can use underscore `_` as the separator:
 
 ```js
 let billion = 1_000_000_000;