diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 82aad6c65..58cec4ff6 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -16,7 +16,7 @@ repos:
     -   id: auto-walrus
 
   - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.255
+    rev: v0.0.257
     hooks:
       - id: ruff
 
diff --git a/data_structures/binary_tree/avl_tree.py b/data_structures/binary_tree/avl_tree.py
index 320e7ed0d..4c1fb17af 100644
--- a/data_structures/binary_tree/avl_tree.py
+++ b/data_structures/binary_tree/avl_tree.py
@@ -60,19 +60,15 @@ class MyNode:
 
     def set_data(self, data: Any) -> None:
         self.data = data
-        return
 
     def set_left(self, node: MyNode | None) -> None:
         self.left = node
-        return
 
     def set_right(self, node: MyNode | None) -> None:
         self.right = node
-        return
 
     def set_height(self, height: int) -> None:
         self.height = height
-        return
 
 
 def get_height(node: MyNode | None) -> int:
diff --git a/machine_learning/polymonial_regression.py b/machine_learning/polymonial_regression.py
index 374c35f7f..487fb8145 100644
--- a/machine_learning/polymonial_regression.py
+++ b/machine_learning/polymonial_regression.py
@@ -34,7 +34,6 @@ def viz_polymonial():
     plt.xlabel("Position level")
     plt.ylabel("Salary")
     plt.show()
-    return
 
 
 if __name__ == "__main__":