diff --git a/sorts/bogo_sort.py b/sorts/bogo_sort.py
index 70785140ee5c..d4b88ac26508 100644
--- a/sorts/bogo_sort.py
+++ b/sorts/bogo_sort.py
@@ -16,7 +16,7 @@
 import random
 
 
-def bogo_sort(collection: list) -> list:
+def bogo_sort(collection: list[int]) -> list[int]:
     """Pure implementation of the bogosort algorithm in Python
     :param collection: some mutable ordered collection with heterogeneous
     comparable items inside
@@ -30,7 +30,7 @@ def bogo_sort(collection: list) -> list:
     [-45, -5, -2]
     """
 
-    def is_sorted(collection: list) -> bool:
+    def is_sorted(collection: list[int]) -> bool:
         for i in range(len(collection) - 1):
             if collection[i] > collection[i + 1]:
                 return False
diff --git a/sorts/unknown_sort.py b/sorts/unknown_sort.py
index 9fa9d22fb5e0..0d792169fa27 100644
--- a/sorts/unknown_sort.py
+++ b/sorts/unknown_sort.py
@@ -6,7 +6,7 @@
 """
 
 
-def merge_sort(collection):
+def merge_sort(collection: list[int]) -> list[int]:
     """Pure implementation of the fastest merge sort algorithm in Python
 
     :param collection: some mutable ordered collection with heterogeneous