diff --git a/Basics/Exercise/23_sets_frozensets/23_sets_frozensets.py b/Basics/Exercise/23_sets_frozensets/23_sets_frozensets.py
index 9b7567e7..51dafcc1 100644
--- a/Basics/Exercise/23_sets_frozensets/23_sets_frozensets.py
+++ b/Basics/Exercise/23_sets_frozensets/23_sets_frozensets.py
@@ -1,5 +1,5 @@
-set1 = {1, 2, 3, 4, 5}
-set2 = {4, 5, 6, 7, 8}
+set1 = frozenset({1, 2, 3, 4, 5})
+set2 = frozenset({4, 5, 6, 7, 8})
 print("Original sets:")
 print(set1)
 print(set2)