diff --git a/.drone.yml b/.drone.yml
index e0bc2f7026..5da6083eb7 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -25,12 +25,6 @@ services:
 
 matrix:
     include:
-        - IMAGE: python:2.7
-          TOXENV: py27
-          DATABASE: sqlite
-        - IMAGE: python:2.7
-          TOXENV: py27
-          DATABASE: postgresql
         - IMAGE: python:3.4
           TOXENV: py34
           DATABASE: sqlite
diff --git a/CHANGELOG b/CHANGELOG
index 2b76346966..38d3d53f1f 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+* Remove support for Python 2.7
+
 Version 4.8.0 - 2018-04-23
 * Bug fixes (see mercurial logs for details)
 * Make description on purchase request optional
diff --git a/INSTALL b/INSTALL
index a7ddb7d1f9..ee85f7e3d1 100644
--- a/INSTALL
+++ b/INSTALL
@@ -4,7 +4,7 @@ Installing trytond_purchase_request
 Prerequisites
 -------------
 
- * Python 2.7 or later (http://www.python.org/)
+ * Python 3.4 or later (http://www.python.org/)
  * trytond (http://www.tryton.org/)
 
 Installation
diff --git a/party.py b/party.py
index 7e658d0e27..0cf3b9a87d 100644
--- a/party.py
+++ b/party.py
@@ -5,8 +5,7 @@ from trytond.pool import PoolMeta
 __all__ = ['PartyReplace']
 
 
-class PartyReplace:
-    __metaclass__ = PoolMeta
+class PartyReplace(metaclass=PoolMeta):
     __name__ = 'party.replace'
 
     @classmethod
diff --git a/purchase.py b/purchase.py
index 9ffc12f8b1..5d186a9db7 100644
--- a/purchase.py
+++ b/purchase.py
@@ -21,9 +21,8 @@ def process_request(func):
     return wrapper
 
 
-class Purchase:
+class Purchase(metaclass=PoolMeta):
     __name__ = 'purchase.purchase'
-    __metaclass__ = PoolMeta
 
     @classmethod
     def __setup__(cls):
@@ -89,8 +88,7 @@ class Purchase:
         super(Purchase, cls).do(purchases)
 
 
-class PurchaseLine:
-    __metaclass__ = PoolMeta
+class PurchaseLine(metaclass=PoolMeta):
     __name__ = 'purchase.line'
 
     requests = fields.One2Many(
diff --git a/purchase_request.py b/purchase_request.py
index 30d3baba11..9f1fdfaadc 100644
--- a/purchase_request.py
+++ b/purchase_request.py
@@ -2,7 +2,7 @@
 # this repository contains the full copyright notices and license terms.
 import datetime
 from decimal import Decimal
-from itertools import groupby, ifilter
+from itertools import groupby
 from functools import partial
 
 from trytond import backend
@@ -384,7 +384,7 @@ class CreatePurchase(Wizard):
                     and request.product == self.ask_party.product
                     and compare_string(
                         request.description, self.ask_party.description))
-            reqs = filter(to_write, requests)
+            reqs = list(filter(to_write, requests))
             if reqs:
                 Request.write(reqs, {
                         'party': self.ask_party.party.id,
@@ -396,7 +396,7 @@ class CreatePurchase(Wizard):
 
         def to_ask_party(request):
             return not request.purchase_line and not request.party
-        reqs = ifilter(to_ask_party, requests)
+        reqs = filter(to_ask_party, requests)
         if any(reqs):
             return 'ask_party'
 
diff --git a/setup.py b/setup.py
index bc0c8a5ae4..4f441f92a0 100644
--- a/setup.py
+++ b/setup.py
@@ -1,15 +1,12 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 
-from setuptools import setup
-import re
-import os
 import io
-try:
-    from configparser import ConfigParser
-except ImportError:
-    from ConfigParser import ConfigParser
+import os
+import re
+from configparser import ConfigParser
+from setuptools import setup
 
 
 def read(fname):
@@ -27,6 +24,7 @@ def get_require_version(name):
         major_version, minor_version + 1)
     return require
 
+
 config = ConfigParser()
 config.readfp(open('tryton.cfg'))
 info = dict(config.items('tryton'))
@@ -103,7 +101,6 @@ setup(name=name,
         'Natural Language :: Slovenian',
         'Natural Language :: Spanish',
         'Operating System :: OS Independent',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
@@ -112,6 +109,7 @@ setup(name=name,
         'Topic :: Office/Business',
         ],
     license='GPL-3',
+    python_requires='>=3.4',
     install_requires=requires,
     dependency_links=dependency_links,
     zip_safe=False,
@@ -121,9 +119,5 @@ setup(name=name,
     """,
     test_suite='tests',
     test_loader='trytond.test_loader:Loader',
-    use_2to3=True,
-    convert_2to3_doctests=[
-        'tests/scenario_purchase_request.rst',
-        ],
     tests_require=tests_require,
     )
diff --git a/tests/scenario_purchase_request.rst b/tests/scenario_purchase_request.rst
index a0367f7e4f..891ccc84ec 100644
--- a/tests/scenario_purchase_request.rst
+++ b/tests/scenario_purchase_request.rst
@@ -169,14 +169,14 @@ Create the purchase then cancel it::
     >>> create_purchase.form.party = supplier
     >>> create_purchase.execute('start')
     >>> pr.state
-    u'purchased'
+    'purchased'
 
     >>> Purchase = Model.get('purchase.purchase')
     >>> purchase, = Purchase.find()
     >>> purchase.click('cancel')
     >>> pr.reload()
     >>> pr.state
-    u'exception'
+    'exception'
 
 Handle the exception::
 
@@ -184,20 +184,20 @@ Handle the exception::
     ...     'purchase.request.handle.purchase.cancellation', [pr])
     >>> handle_exception.execute('reset')
     >>> pr.state
-    u'draft'
+    'draft'
 
 Recreate a purchase and cancel it again::
 
     >>> create_purchase = Wizard('purchase.request.create_purchase',
     ...     [pr])
     >>> pr.state
-    u'purchased'
+    'purchased'
 
     >>> purchase, = Purchase.find([('state', '=', 'draft')])
     >>> purchase.click('cancel')
     >>> pr.reload()
     >>> pr.state
-    u'exception'
+    'exception'
 
 Handle again the exception::
 
@@ -205,7 +205,7 @@ Handle again the exception::
     ...     'purchase.request.handle.purchase.cancellation', [pr])
     >>> handle_exception.execute('cancel_request')
     >>> pr.state
-    u'cancel'
+    'cancel'
 
 Re-create the purchase request::
 
@@ -236,7 +236,7 @@ Create the purchase with a unique line::
     >>> create_purchase.form.party = supplier
     >>> create_purchase.execute('start')
     >>> pr.state
-    u'purchased'
+    'purchased'
 
     >>> Purchase = Model.get('purchase.purchase')
     >>> purchase, = Purchase.find([('state', '=', 'draft')])
@@ -265,11 +265,11 @@ Create the purchase without product::
     >>> create_purchase.form.party = supplier
     >>> create_purchase.execute('start')
     >>> pr.state
-    u'purchased'
+    'purchased'
 
     >>> pr.purchase_line.product
     >>> pr.purchase_line.description
-    u'Custom product'
+    'Custom product'
     >>> pr.purchase_line.quantity
     1.0
     >>> pr.purchase_line.unit
diff --git a/tox.ini b/tox.ini
index 2082ab4f4d..adbcbf8431 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,11 +1,11 @@
 [tox]
-envlist = {py27,py34,py35,py36}-{sqlite,postgresql},pypy-{sqlite,postgresql}
+envlist = {py34,py35,py36}-{sqlite,postgresql},pypy3-{sqlite,postgresql}
 
 [testenv]
 commands = {envpython} setup.py test
 deps =
-    {py27,py34,py35,py36}-postgresql: psycopg2 >= 2.5
-    pypy-postgresql: psycopg2cffi >= 2.5
+    {py34,py35,py36}-postgresql: psycopg2 >= 2.5
+    pypy3-postgresql: psycopg2cffi >= 2.5
     sqlite: sqlitebck
 setenv =
     sqlite: TRYTOND_DATABASE_URI={env:SQLITE_URI:sqlite://}