diff --git a/flatisfy/config.py b/flatisfy/config.py
index 2211944..bd5fe52 100644
--- a/flatisfy/config.py
+++ b/flatisfy/config.py
@@ -143,7 +143,7 @@ def validate_config(config, check_with_data):
         assert config["smtp_to"] is None or isinstance(config["smtp_to"], list)
 
         assert isinstance(config["store_personal_data"], bool)
-        assert isinstance(config["max_distance_housing_station"], int) or isinstance(config["max_distance_housing_station"], float)  # noqa: E501
+        assert isinstance(config["max_distance_housing_station"], (int, float))
 
         # Ensure constraints are ok
         assert config["constraints"]
diff --git a/flatisfy/models/flat.py b/flatisfy/models/flat.py
index c3a68a9..340e7a6 100644
--- a/flatisfy/models/flat.py
+++ b/flatisfy/models/flat.py
@@ -5,10 +5,10 @@ This modules defines an SQLAlchemy ORM model for a flat.
 # pylint: disable=locally-disabled,invalid-name,too-few-public-methods
 from __future__ import absolute_import, print_function, unicode_literals
 
+import enum
 import logging
 
 import arrow
-import enum
 
 from sqlalchemy import (
     Column, DateTime, Enum, Float, SmallInteger, String, Text, inspect