diff --git a/conf/requirements.txt b/conf/requirements.txt
index 1bb465f..93d3f50 100644
--- a/conf/requirements.txt
+++ b/conf/requirements.txt
@@ -1,3 +1,4 @@
+coverage==5.1
 Django==2.2.12
 django-bootstrap4
 django-fa==1.0.0
diff --git a/nwfilters/models.py b/nwfilters/models.py
index 1dfab76..71a8362 100644
--- a/nwfilters/models.py
+++ b/nwfilters/models.py
@@ -1,6 +1,3 @@
-# -*- coding: utf-8 -*-
-from __future__ import unicode_literals
-
 from django.db import models
 
 # Create your models here.