diff --git a/example_script_with_progressbar.py b/example_script_with_progressbar.py
index 88dc392..aa162b6 100644
--- a/example_script_with_progressbar.py
+++ b/example_script_with_progressbar.py
@@ -26,6 +26,7 @@
 To execute:
 `python example_script.py`
 """
+
 import os
 import time
 from pathlib import Path
diff --git a/src/py_moodle/course.py b/src/py_moodle/course.py
index 6d30cde..0ef30b2 100644
--- a/src/py_moodle/course.py
+++ b/src/py_moodle/course.py
@@ -5,6 +5,7 @@
 Provides functions to list courses, retrieve course details,
 and enumerate course sections using AJAX endpoints.
 """
+
 import json
 import time
 import urllib.parse
diff --git a/src/py_moodle/folder.py b/src/py_moodle/folder.py
index 7bf2022..c09a41d 100644
--- a/src/py_moodle/folder.py
+++ b/src/py_moodle/folder.py
@@ -8,6 +8,7 @@
 
 All code and comments are in English.
 """
+
 import json
 import re
 import time
diff --git a/src/py_moodle/module.py b/src/py_moodle/module.py
index a608155..ae22e63 100644
--- a/src/py_moodle/module.py
+++ b/src/py_moodle/module.py
@@ -3,6 +3,7 @@
 Generic Moodle module management helpers.
 All code and comments are in English.
 """
+
 import json
 import re
 import time
diff --git a/src/py_moodle/upload.py b/src/py_moodle/upload.py
index 7460a4c..44f8248 100644
--- a/src/py_moodle/upload.py
+++ b/src/py_moodle/upload.py
@@ -4,6 +4,7 @@
 
 This method requires a webservice token with 'core_files_upload' capability.
 """
+
 import mimetypes
 import os
 from pathlib import Path
diff --git a/src/py_moodle/url.py b/src/py_moodle/url.py
index 61f2f9a..18d3209 100644
--- a/src/py_moodle/url.py
+++ b/src/py_moodle/url.py
@@ -4,6 +4,7 @@
 Provides functions to create and delete "url" modules linking to external resources.
 All code and comments are in English.
 """
+
 from __future__ import annotations
 
 import time