diff --git a/1-js/05-data-types/07-map-set-weakmap-weakset/article.md b/1-js/05-data-types/07-map-set-weakmap-weakset/article.md
index a09edda5..a0e0d346 100644
--- a/1-js/05-data-types/07-map-set-weakmap-weakset/article.md
+++ b/1-js/05-data-types/07-map-set-weakmap-weakset/article.md
@@ -167,7 +167,7 @@ recipeMap.forEach( (value, key, map) => {
 
 ## Set
 
-`Set` -- is a collection of values, where each value may occur.
+`Set` -- is a collection of values, where each value may occur only once.
 
 The main methods are: