diff --git a/tests/test_asd.py b/tests/test_asd.py
index 8140cf4..0cf0d03 100644
--- a/tests/test_asd.py
+++ b/tests/test_asd.py
@@ -1,4 +1,5 @@
 """Test the functioning of loading .asd files."""
+
 from pathlib import Path
 import pytest
 
diff --git a/topofileformats/asd.py b/topofileformats/asd.py
index a9c2225..a4d86dd 100644
--- a/topofileformats/asd.py
+++ b/topofileformats/asd.py
@@ -1,4 +1,5 @@
 """For decoding and loading .asd AFM file format into Python Numpy arrays."""
+
 from __future__ import annotations
 from pathlib import Path
 from typing import BinaryIO