diff --git a/subjects/pick-omit/README.md b/subjects/pick-omit/README.md
index d8f51ff63..82ee70325 100644
--- a/subjects/pick-omit/README.md
+++ b/subjects/pick-omit/README.md
@@ -7,6 +7,7 @@ Create two functions which taken an object and a string or array of strings. The
 - `omit`: contains only those keys which do not match the string, or do not appear in the array of strings.
 
 > Those functions are pure and must not modify the given object
+> It should ignore properties from the prototype chain
 
 ### Notions