diff --git a/Makefile b/Makefile
index 940d98c..a31dbd8 100644
--- a/Makefile
+++ b/Makefile
@@ -20,6 +20,7 @@ init-pre_commit: # Set up git pre-commit hook
 
 lint: # Lint code
 	${VBIN}/black --quiet --check *.py && echo "✅ black" || echo "🚨 black"
+	${VBIN}/pydocstyle && echo "✅ pydocstyle"  || echo "🚨 pydocstyle"
 
 open_all: # Open all projects files
 	${EDITOR} ${VBIN}/activate
diff --git a/README.md b/README.md
index cb1ce54..7315af5 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ Rajouter le code sous-titre en paramètre:
 ### 🚀 Chauffe Marcel!
 
 - `Python 3.10` à été utilisé
-- Code formaté avec [`black`](https://pypi.org/project/black)
+- Code formaté avec [`black`](https://pypi.org/project/black) & [`pydocstyle`](https://pypi.org/project/pydocstyle/)
 - Installation des outils de développement:
     * `pip install -r requirements-dev.txt`
 - Un `Makefile` équipé: executer `make help` pour le détail
diff --git a/delarte.py b/delarte.py
index e0b0cb8..16528f3 100755
--- a/delarte.py
+++ b/delarte.py
@@ -1,3 +1,16 @@
+#!/usr/bin/env python3
+# coding:utf-8
+
+"""delarte.
+
+Retrieve video stream in a local file, including sub-titles
+
+Licence: GNU AGPL v3: http://www.gnu.org/licenses/
+
+This file is part of [`delarte`](https://git.afpy.org/fcode/delarte)
+"""
+
+
 import json
 import sys
 import re
@@ -17,6 +30,7 @@ FFMPEG = environ.get("PATH_FFMPEG", "ffmpeg path not found")
 
 
 def call_api(api_url):
+    """Retrieve subtitles versions available for a given URL."""
     http_response = urlopen(api_url)
 
     if http_response.status != HTTPStatus.OK:
@@ -35,6 +49,7 @@ def call_api(api_url):
 
 
 def write_subtitles(m3u8_url, base_name):
+    """Convert distant vtt subtitles to local srt."""
     main = m3u8.load(m3u8_url)
 
     sub_m3u8_urls = [
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 7e66a17..b709a81 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1 +1,3 @@
 black
+pydocstyle
+toml