diff --git a/editing/captions/6/en.srt b/editing/captions/6/en.srt
index fb0f3e2..04987ea 100644
--- a/editing/captions/6/en.srt
+++ b/editing/captions/6/en.srt
@@ -2057,4 +2057,3 @@ thanks a lot for answering all my questions, going deep into
 01:00:15,335 --> 01:00:21,018
 the history and into the technical parts. It's really
 awesome. It was really a pleasure.
-
diff --git a/editing/captions/6/ru.srt b/editing/captions/6/ru.srt
index 63d5e86..a4ad449 100644
--- a/editing/captions/6/ru.srt
+++ b/editing/captions/6/ru.srt
@@ -2485,4 +2485,3 @@ IBM взяла на вооружение технологию Intel для пр
 622
 01:00:19,790000 --> 01:00:21,210000
 это было действительно приятно.
-
diff --git a/editing/pyproject.toml b/editing/pyproject.toml
index d1f2714..02e5953 100644
--- a/editing/pyproject.toml
+++ b/editing/pyproject.toml
@@ -19,3 +19,12 @@ srt = "^3.5"
 [build-system]
 requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"
+
+
+[tool.ruff]
+line-length = 80
+fix = true
+
+[tool.ruff.lint]
+select = ['F', 'I']
+fixable = ['ALL']
diff --git a/editing/srt-from-json.py b/editing/srt-from-json.py
index 4bb10e7..570ace1 100644
--- a/editing/srt-from-json.py
+++ b/editing/srt-from-json.py
@@ -1,43 +1,50 @@
-import sys
-import json
 import datetime as dt
+import json
+import sys
 from typing import Final
 
-_TIME_FORMAT: Final = '%H:%M:%S,%f'
+_TIME_FORMAT: Final = "%H:%M:%S,%f"
 
 
 def _srt_from_json(filepath: str) -> int:
-    with open(filepath, encoding='utf8') as json_file:
+    with open(filepath, encoding="utf8") as json_file:
         contents = json.loads(json_file.read())
 
     start_time = None
     resulting_lines = []
-    for index, entry in enumerate(contents['subtitles']):
+    for index, entry in enumerate(contents["subtitles"]):
         # Number
-        resulting_lines.append(f'{index + 1}\n')
+        resulting_lines.append(f"{index + 1}\n")
 
         # Time
         if start_time is None:
             start_time = dt.datetime(
-                year=1, month=1, day=1, hour=0, minute=0, second=0,
-            ) + dt.timedelta(milliseconds=entry['startMs'])
-        end = start_time + dt.timedelta(milliseconds=entry['durationMs'])
-        resulting_lines.append('{0} --> {1}\n'.format(
-            start_time.strftime(_TIME_FORMAT),
-            end.strftime(_TIME_FORMAT),
-        ))
+                year=1,
+                month=1,
+                day=1,
+                hour=0,
+                minute=0,
+                second=0,
+            ) + dt.timedelta(milliseconds=entry["startMs"])
+        end = start_time + dt.timedelta(milliseconds=entry["durationMs"])
+        resulting_lines.append(
+            "{0} --> {1}\n".format(
+                start_time.strftime(_TIME_FORMAT),
+                end.strftime(_TIME_FORMAT),
+            )
+        )
         start_time = None
 
         # Content
-        resulting_lines.append(entry['text'])
+        resulting_lines.append(entry["text"])
 
         # Newlines
-        resulting_lines.extend(['\n'] * 2)
+        resulting_lines.extend(["\n"] * 2)
 
-    with open('out.srt', 'w', encoding='utf8') as output_file:
+    with open("out.srt", "w", encoding="utf8") as output_file:
         output_file.writelines(resulting_lines)
     return 0
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     sys.exit(_srt_from_json(filepath=sys.argv[1]))
diff --git a/editing/srt-shift.py b/editing/srt-shift.py
index 3d13bae..4c689bc 100644
--- a/editing/srt-shift.py
+++ b/editing/srt-shift.py
@@ -1,6 +1,6 @@
 import argparse
-import sys
 import datetime as dt
+import sys
 from io import TextIOWrapper
 
 import srt
@@ -33,23 +33,27 @@ def _cut_since_with_duration(
     for caption in captions:
         if caption.index >= since:
             caption.start = _update_time(
-                caption.start, delta, is_negative=is_negative,
+                caption.start,
+                delta,
+                is_negative=is_negative,
             )
             caption.end = _update_time(
-                caption.end, delta, is_negative=is_negative,
+                caption.end,
+                delta,
+                is_negative=is_negative,
             )
         updated_srt.append(caption)
 
-    with open('out.srt', mode='w', encoding='utf8') as out:
+    with open("out.srt", mode="w", encoding="utf8") as out:
         out.write(srt.compose(updated_srt))
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     parser = argparse.ArgumentParser(__name__)
-    parser.add_argument('fileobj', type=argparse.FileType())
-    parser.add_argument('--since', type=int)
-    parser.add_argument('--seconds', type=int)
-    parser.add_argument('--negative', action='store_true')
+    parser.add_argument("fileobj", type=argparse.FileType())
+    parser.add_argument("--since", type=int)
+    parser.add_argument("--seconds", type=int)
+    parser.add_argument("--negative", action="store_true")
     args = parser.parse_args()
 
     code = _cut_since_with_duration(
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