diff --git a/Spectrum2/backend.py b/Spectrum2/backend.py
index 6174810..934535a 100644
--- a/Spectrum2/backend.py
+++ b/Spectrum2/backend.py
@@ -1,6 +1,3 @@
-# use unicode encoding for all literals by default (for python2.x)
-from __future__ import unicode_literals
-
 __author__ = "Steffen Vogel"
 __copyright__ = "Copyright 2015-2017, Steffen Vogel"
 __license__ = "GPLv3"
diff --git a/Spectrum2/iochannel.py b/Spectrum2/iochannel.py
index 851a197..7c84a92 100644
--- a/Spectrum2/iochannel.py
+++ b/Spectrum2/iochannel.py
@@ -1,6 +1,3 @@
-# use unicode encoding for all literals by default (for python2.x)
-from __future__ import unicode_literals
-
 __author__ = "Steffen Vogel"
 __copyright__ = "Copyright 2015-2017, Steffen Vogel"
 __license__ = "GPLv3"
diff --git a/setup.py b/setup.py
index 2c477a8..d5645ab 100755
--- a/setup.py
+++ b/setup.py
@@ -23,6 +23,7 @@ setup(name='transwhat',
 	url='https://github.com/stv0g/transwhat',
 	author='Steffen Vogel',
 	author_email='stv0g@0l.de',
+	python_requires='>=3.5',
 	classifiers=[
 		'License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)',
 		'Development Status :: 4 - Beta',
diff --git a/transWhat/bot.py b/transWhat/bot.py
index f60a911..1515918 100644
--- a/transWhat/bot.py
+++ b/transWhat/bot.py
@@ -1,6 +1,3 @@
-# use unicode encoding for all literals by default (for python2.x)
-from __future__ import unicode_literals
-
 __author__ = "Steffen Vogel"
 __copyright__ = "Copyright 2015-2017, Steffen Vogel"
 __license__ = "GPLv3"
diff --git a/transWhat/buddy.py b/transWhat/buddy.py
index ffcdd44..c232d09 100644
--- a/transWhat/buddy.py
+++ b/transWhat/buddy.py
@@ -1,6 +1,3 @@
-# use unicode encoding for all literals by default (for python2.x)
-from __future__ import unicode_literals
-
 __author__ = "Steffen Vogel"
 __copyright__ = "Copyright 2015-2017, Steffen Vogel"
 __license__ = "GPLv3"
diff --git a/transWhat/deferred.py b/transWhat/deferred.py
index 6d075ae..f8d26d9 100644
--- a/transWhat/deferred.py
+++ b/transWhat/deferred.py
@@ -1,6 +1,3 @@
-# use unicode encoding for all literals by default (for python2.x)
-from __future__ import unicode_literals
-
 __author__ = "Steffen Vogel"
 __copyright__ = "Copyright 2015-2017, Steffen Vogel"
 __license__ = "GPLv3"
diff --git a/transWhat/group.py b/transWhat/group.py
index b30140d..261a215 100644
--- a/transWhat/group.py
+++ b/transWhat/group.py
@@ -1,6 +1,3 @@
-# use unicode encoding for all literals by default (for python2.x)
-from __future__ import unicode_literals
-
 __author__ = "Steffen Vogel"
 __copyright__ = "Copyright 2015-2017, Steffen Vogel"
 __license__ = "GPLv3"
diff --git a/transWhat/registersession.py b/transWhat/registersession.py
index 82c0698..2511847 100644
--- a/transWhat/registersession.py
+++ b/transWhat/registersession.py
@@ -1,6 +1,3 @@
-# use unicode encoding for all literals by default (for python2.x)
-from __future__ import unicode_literals
-
 __author__ = "Steffen Vogel"
 __copyright__ = "Copyright 2015-2017, Steffen Vogel"
 __license__ = "GPLv3"
diff --git a/transWhat/session.py b/transWhat/session.py
index f02bf5f..9678f56 100644
--- a/transWhat/session.py
+++ b/transWhat/session.py
@@ -1,6 +1,3 @@
-# use unicode encoding for all literals by default (for python2.x)
-from __future__ import unicode_literals
-
 __author__ = "Steffen Vogel"
 __copyright__ = "Copyright 2015-2017, Steffen Vogel"
 __license__ = "GPLv3"
diff --git a/transWhat/threadutils.py b/transWhat/threadutils.py
index 4e07ed0..3705c00 100644
--- a/transWhat/threadutils.py
+++ b/transWhat/threadutils.py
@@ -1,6 +1,3 @@
-# use unicode encoding for all literals by default (for python2.x)
-from __future__ import unicode_literals
-
 __author__ = "Steffen Vogel"
 __copyright__ = "Copyright 2015-2017, Steffen Vogel"
 __license__ = "GPLv3"
diff --git a/transWhat/transwhat.py b/transWhat/transwhat.py
index 7491189..27fff6e 100755
--- a/transWhat/transwhat.py
+++ b/transWhat/transwhat.py
@@ -1,8 +1,5 @@
 #!/usr/bin/python
 
-# use unicode encoding for all literals by default (for python2.x)
-from __future__ import unicode_literals
-
 __author__ = "Steffen Vogel"
 __copyright__ = "Copyright 2015-2017, Steffen Vogel"
 __license__ = "GPLv3"
diff --git a/transWhat/utils.py b/transWhat/utils.py
index 5b316fc..d21e7e0 100644
--- a/transWhat/utils.py
+++ b/transWhat/utils.py
@@ -1,6 +1,3 @@
-# use unicode encoding for all literals by default (for python2.x)
-from __future__ import unicode_literals
-
 __author__ = "Steffen Vogel"
 __copyright__ = "Copyright 2015-2017, Steffen Vogel"
 __license__ = "GPLv3"
diff --git a/transWhat/whatsappbackend.py b/transWhat/whatsappbackend.py
index 3390dfc..551c1ee 100644
--- a/transWhat/whatsappbackend.py
+++ b/transWhat/whatsappbackend.py
@@ -1,6 +1,3 @@
-# use unicode encoding for all literals by default (for python2.x)
-from __future__ import unicode_literals
-
 __author__ = "Steffen Vogel"
 __copyright__ = "Copyright 2015-2017, Steffen Vogel"
 __license__ = "GPLv3"
diff --git a/transWhat/yowsupwrapper.py b/transWhat/yowsupwrapper.py
index 486e7fe..822660c 100644
--- a/transWhat/yowsupwrapper.py
+++ b/transWhat/yowsupwrapper.py
@@ -1,6 +1,3 @@
-# use unicode encoding for all literals by default (for python2.x)
-from __future__ import unicode_literals
-
 __author__ = "Steffen Vogel"
 __copyright__ = "Copyright 2015-2017, Steffen Vogel"
 __license__ = "GPLv3"