diff --git a/sorts/pancake_sort.py b/sorts/pancake_sort.py
index e5d600738435..80cb23418c47 100644
--- a/sorts/pancake_sort.py
+++ b/sorts/pancake_sort.py
@@ -9,7 +9,7 @@
 """
 
 
-def pancake_sort(arr):
+def pancake_sort[T: (int, float)](arr: list[T]) -> list[T]:
     """Sort Array with Pancake Sort.
     :param arr: Collection containing comparable items
     :return: Collection ordered in ascending order of items