diff --git a/escpos/cli.py b/escpos/cli.py
index 21b884b..fa0c6af 100644
--- a/escpos/cli.py
+++ b/escpos/cli.py
@@ -9,6 +9,9 @@ It requires you to have a configuration file. See documentation for details.
 """
 
 from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
 
 import argparse
 import sys
diff --git a/escpos/config.py b/escpos/config.py
index def8e68..448f825 100644
--- a/escpos/config.py
+++ b/escpos/config.py
@@ -5,6 +5,9 @@ This module contains the implentations of abstract base class :py:class:`Config`
 """
 
 from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
 
 import os
 import appdirs