diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 3f744b5..dd248f9 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -12,23 +12,21 @@ repos:
       - id: check-merge-conflict
       - id: check-yaml
         args: [ --unsafe ]
-  - repo: https://github.com/pre-commit/mirrors-isort
-    rev: v5.8.0
-    hooks:
-      - id: isort
-        args: [ "--filter-files" ]
   - repo: https://github.com/psf/black
     rev: 22.10.0
     hooks:
     - id: black
       additional_dependencies: ["click==8.0.4"]
-  - repo: https://github.com/pycqa/flake8
-    rev: 7.0.0
-    hooks:
-      - id: flake8
-        exclude: conf.py
   - repo: https://github.com/pre-commit/mirrors-mypy
     rev: v1.8.0
     hooks:
       - id: mypy
         exclude: tests/
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    # Ruff version.
+    rev: v0.1.5
+    hooks:
+      # Run the linter.
+      - id: ruff
+        args: [ --fix ]
+        exclude: ^docs/
diff --git a/makefile b/makefile
index f5cb2a1..207939c 100644
--- a/makefile
+++ b/makefile
@@ -8,7 +8,7 @@ license:
 	python tests/_license/header_check.py
 
 format: license
-	isort $(sources) tests
+	ruff check --fix $(sources) tests
 	black $(sources) tests
 
 lint: license
diff --git a/tests/test_latlon.py b/tests/test_latlon.py
index 2b20940..9655f92 100644
--- a/tests/test_latlon.py
+++ b/tests/test_latlon.py
@@ -1,3 +1,18 @@
+# SPDX-FileCopyrightText: Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 import torch
 
 from earth2grid.latlon import equiangular_lat_lon_grid