diff --git a/examples/barcodes.py b/examples/barcodes.py
index 86bc77b..9eec4f5 100644
--- a/examples/barcodes.py
+++ b/examples/barcodes.py
@@ -1,3 +1,8 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
 from escpos.printer import Usb
 
 
diff --git a/examples/codepage_tables.py b/examples/codepage_tables.py
index 2b5e98a..e5b0d66 100644
--- a/examples/codepage_tables.py
+++ b/examples/codepage_tables.py
@@ -1,13 +1,16 @@
 """Prints code page tables.
 """
-
+from __future__ import absolute_import
+from __future__ import division
 from __future__ import print_function
+from __future__ import unicode_literals
 
-import six
 import sys
 
 from escpos import printer
-from escpos.constants import CODEPAGE_CHANGE, ESC, CTL_LF, CTL_FF, CTL_CR, CTL_HT, CTL_VT
+from escpos.constants import CODEPAGE_CHANGE, CTL_CR, CTL_FF, CTL_HT, CTL_LF, CTL_VT, ESC
+
+import six
 
 
 def main():
diff --git a/examples/qr_code.py b/examples/qr_code.py
index 15120b4..8fa9341 100644
--- a/examples/qr_code.py
+++ b/examples/qr_code.py
@@ -1,3 +1,8 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
 import sys
 
 from escpos.printer import Usb
diff --git a/examples/software_barcode.py b/examples/software_barcode.py
index 93c8e30..458cff0 100644
--- a/examples/software_barcode.py
+++ b/examples/software_barcode.py
@@ -1,3 +1,8 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
 from escpos.printer import Usb
 
 
diff --git a/examples/weather.py b/examples/weather.py
index 4dc9923..b370820 100644
--- a/examples/weather.py
+++ b/examples/weather.py
@@ -12,14 +12,17 @@
 # Icons taken from http://adamwhitcroft.com/climacons/
 # Check out his github: https://github.com/AdamWhitcroft/climacons
 
-
+from __future__ import absolute_import
+from __future__ import division
 from __future__ import print_function
-from datetime import datetime
+from __future__ import unicode_literals
+
 import calendar
-import urllib
 import json
-import time
 import os
+import time
+import urllib
+from datetime import datetime
 
 from escpos.printer import Usb
 
diff --git a/setup.py b/setup.py
index d09c472..dbdcaae 100755
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,13 @@
 #!/usr/bin/env python
 
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+# from __future__ import unicode_literals
+
 import os
 import sys
+
 from setuptools import find_packages, setup
 
 
diff --git a/src/escpos/capabilities.py b/src/escpos/capabilities.py
index 0cf76e1..c39d8c8 100644
--- a/src/escpos/capabilities.py
+++ b/src/escpos/capabilities.py
@@ -1,3 +1,8 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
 import re
 from os import environ, path
 import pickle