diff --git a/docs/conf.py b/docs/conf.py
index 4789396e..1ec26a5d 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,7 +1,3 @@
-# coding: utf8
-import os
-import sys
-
 templates_path = ["_templates"]
 source_suffix = ".rst"
 master_doc = "index"
diff --git a/ihatemoney/api/common.py b/ihatemoney/api/common.py
index 51ce96e8..9aefa2c8 100644
--- a/ihatemoney/api/common.py
+++ b/ihatemoney/api/common.py
@@ -1,4 +1,3 @@
-# coding: utf8
 from functools import wraps
 
 from flask import current_app, request
diff --git a/ihatemoney/api/v1/resources.py b/ihatemoney/api/v1/resources.py
index 87950f65..dc1708ce 100644
--- a/ihatemoney/api/v1/resources.py
+++ b/ihatemoney/api/v1/resources.py
@@ -1,4 +1,3 @@
-# coding: utf8
 from flask import Blueprint
 from flask_cors import CORS
 from flask_restful import Api
diff --git a/ihatemoney/tests/tests.py b/ihatemoney/tests/tests.py
index b27fafcc..03ad9537 100644
--- a/ihatemoney/tests/tests.py
+++ b/ihatemoney/tests/tests.py
@@ -1,4 +1,3 @@
-# coding: utf8
 import base64
 from collections import defaultdict
 import datetime