diff --git a/pyproject.toml b/pyproject.toml
index 535baf6b..fa723d9b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@
 # For comprehensive documentation and usage instructions, visit: https://docs.ultralytics.com
 
 [build-system]
-requires = ["setuptools>=43.0.0", "wheel"]
+requires = ["setuptools>=57.0.0", "wheel"]
 build-backend = "setuptools.build_meta"
 
 # Project settings -----------------------------------------------------------------------------------------------------
diff --git a/ultralytics/data/base.py b/ultralytics/data/base.py
index b379eefa..946cb1f1 100644
--- a/ultralytics/data/base.py
+++ b/ultralytics/data/base.py
@@ -122,9 +122,7 @@ class BaseDataset(Dataset):
         except Exception as e:
             raise FileNotFoundError(f"{self.prefix}Error loading data from {img_path}\n{HELP_URL}") from e
         if self.fraction < 1:
-            # im_files = im_files[: round(len(im_files) * self.fraction)]
-            num_elements_to_select = round(len(im_files) * self.fraction)
-            im_files = random.sample(im_files, num_elements_to_select)
+            im_files = im_files[: round(len(im_files) * self.fraction)]  # retain a fraction of the dataset
         return im_files
 
     def update_labels(self, include_class: Optional[list]):
diff --git a/ultralytics/data/dataset.py b/ultralytics/data/dataset.py
index 3f8c85a7..fed360ce 100644
--- a/ultralytics/data/dataset.py
+++ b/ultralytics/data/dataset.py
@@ -1,4 +1,5 @@
 # Ultralytics YOLO 🚀, AGPL-3.0 license
+
 import contextlib
 import json
 from collections import defaultdict