diff --git a/README.rst b/README.rst
index 2e991cb35..fb668b237 100644
--- a/README.rst
+++ b/README.rst
@@ -98,7 +98,7 @@ psutil currently supports the following platforms:
 - **Sun Solaris**
 - **AIX**
 
-Supported Python versions are **2.7**, **3.4+** and
+Supported Python versions are **2.7**, **3.5+** and
 `PyPy <http://pypy.org/>`__.
 
 Funding
diff --git a/docs/index.rst b/docs/index.rst
index 2bf050a11..8250cbcb3 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -38,7 +38,7 @@ psutil currently supports the following platforms:
 - **Sun Solaris**
 - **AIX**
 
-Supported Python versions are **2.7** and **3.4+**.
+Supported Python versions are **2.7** and **3.5+**.
 `PyPy <http://pypy.org/>`__ is also known to work.
 
 The psutil documentation you're reading is distributed as a single HTML page.
@@ -2632,7 +2632,7 @@ Platforms support history
 * psutil 0.1.1 (2009-03): **FreeBSD**
 * psutil 0.1.0 (2009-01): **Linux, Windows, macOS**
 
-Supported Python versions are 2.7, 3.4+ and PyPy3.
+Supported Python versions are 2.7, 3.5+ and PyPy3.
 
 Timeline
 ========
diff --git a/psutil/__init__.py b/psutil/__init__.py
index 2b0b3c6b0..d506244cc 100644
--- a/psutil/__init__.py
+++ b/psutil/__init__.py
@@ -17,7 +17,7 @@
  - Sun Solaris
  - AIX
 
-Works with Python versions 2.7 and 3.4+.
+Works with Python versions 2.7 and 3.5+.
 """
 
 from __future__ import division
@@ -2181,7 +2181,7 @@ def net_if_addrs():
     Note: you can have more than one address of the same family
     associated with each interface.
     """
-    has_enums = sys.version_info >= (3, 4)
+    has_enums = sys.version_info[0] >= 3
     if has_enums:
         import socket
     rawlist = _psplatform.net_if_addrs()
diff --git a/psutil/_common.py b/psutil/_common.py
index 922867464..85973dae0 100644
--- a/psutil/_common.py
+++ b/psutil/_common.py
@@ -35,7 +35,7 @@
 except ImportError:
     AF_UNIX = None
 
-if sys.version_info >= (3, 4):
+if sys.version_info[0] >= 3:
     import enum
 else:
     enum = None
diff --git a/psutil/_pslinux.py b/psutil/_pslinux.py
index d178fe163..aaee9df86 100644
--- a/psutil/_pslinux.py
+++ b/psutil/_pslinux.py
@@ -53,7 +53,7 @@
 from ._compat import basestring
 
 
-if sys.version_info >= (3, 4):
+if sys.version_info[0] >= 3:
     import enum
 else:
     enum = None
diff --git a/psutil/_psposix.py b/psutil/_psposix.py
index 1d250bf75..4cc63439c 100644
--- a/psutil/_psposix.py
+++ b/psutil/_psposix.py
@@ -28,7 +28,7 @@
     from . import _psutil_osx
 
 
-if sys.version_info >= (3, 4):
+if sys.version_info[0] >= 3:
     import enum
 else:
     enum = None
diff --git a/psutil/_pswindows.py b/psutil/_pswindows.py
index 4081aa17f..2c8e41487 100644
--- a/psutil/_pswindows.py
+++ b/psutil/_pswindows.py
@@ -56,7 +56,7 @@
     else:
         raise
 
-if sys.version_info >= (3, 4):
+if sys.version_info[0] >= 3:
     import enum
 else:
     enum = None
diff --git a/psutil/tests/__init__.py b/psutil/tests/__init__.py
index e6f0abc35..13395dd7d 100644
--- a/psutil/tests/__init__.py
+++ b/psutil/tests/__init__.py
@@ -67,7 +67,7 @@
         warnings.simplefilter("ignore")
         import mock  # NOQA - requires "pip install mock"
 
-if sys.version_info >= (3, 4):
+if sys.version_info[0] >= 3:
     import enum
 else:
     enum = None
@@ -1714,9 +1714,6 @@ def import_module_by_path(path):
     if sys.version_info[0] == 2:
         import imp
         return imp.load_source(name, path)
-    elif sys.version_info[:2] <= (3, 4):
-        from importlib.machinery import SourceFileLoader
-        return SourceFileLoader(name, path).load_module()
     else:
         import importlib.util
         spec = importlib.util.spec_from_file_location(name, path)
diff --git a/psutil/tests/test_contracts.py b/psutil/tests/test_contracts.py
index 7f299a624..b1a5af566 100755
--- a/psutil/tests/test_contracts.py
+++ b/psutil/tests/test_contracts.py
@@ -723,7 +723,7 @@ def nice(self, ret, info):
             priorities = [getattr(psutil, x) for x in dir(psutil)
                           if x.endswith('_PRIORITY_CLASS')]
             self.assertIn(ret, priorities)
-            if sys.version_info > (3, 4):
+            if sys.version_info[0] >= 3:
                 self.assertIsInstance(ret, enum.IntEnum)
             else:
                 self.assertIsInstance(ret, int)
diff --git a/psutil/tests/test_system.py b/psutil/tests/test_system.py
index 414c86e99..4d9dcd848 100755
--- a/psutil/tests/test_system.py
+++ b/psutil/tests/test_system.py
@@ -751,7 +751,7 @@ def test_net_if_addrs(self):
                 self.assertIsInstance(addr.netmask, (str, type(None)))
                 self.assertIsInstance(addr.broadcast, (str, type(None)))
                 self.assertIn(addr.family, families)
-                if sys.version_info >= (3, 4) and not PYPY:
+                if sys.version_info[0] >= 3 and not PYPY:
                     self.assertIsInstance(addr.family, enum.IntEnum)
                 if nic_stats[nic].isup:
                     # Do not test binding to addresses of interfaces
diff --git a/scripts/internal/print_announce.py b/scripts/internal/print_announce.py
index 510dc15f6..f33150f6d 100755
--- a/scripts/internal/print_announce.py
+++ b/scripts/internal/print_announce.py
@@ -47,7 +47,7 @@
 nice, ionice, iostat, iotop, uptime, pidof, tty, taskset, pmap. It \
 currently supports Linux, Windows, macOS, Sun Solaris, FreeBSD, OpenBSD, \
 NetBSD and AIX, both 32-bit and 64-bit architectures.  Supported Python \
-versions are 2.7 and 3.4+. PyPy is also known to work.
+versions are 2.7 and 3.5+. PyPy is also known to work.
 
 What's new
 ==========
diff --git a/scripts/internal/winmake.py b/scripts/internal/winmake.py
index f92b2a896..5ec2ecbfd 100755
--- a/scripts/internal/winmake.py
+++ b/scripts/internal/winmake.py
@@ -54,14 +54,13 @@
     "wheel",
 ]
 
-if sys.version_info[:2] >= (3, 5):
-    DEPS.append('flake8-bugbear')
-if sys.version_info[:2] <= (2, 7):
+if sys.version_info[0] == 2:
     DEPS.append('mock')
-if sys.version_info[:2] <= (3, 2):
     DEPS.append('ipaddress')
-if sys.version_info[:2] <= (3, 4):
     DEPS.append('enum34')
+else:
+    DEPS.append('flake8-bugbear')
+
 if not PYPY:
     DEPS.append("pywin32")
     DEPS.append("wmi")
diff --git a/setup.py b/setup.py
index 2b8b2abb2..ce9afc734 100755
--- a/setup.py
+++ b/setup.py
@@ -444,7 +444,8 @@ def main():
     )
     if setuptools is not None:
         kwargs.update(
-            python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*",
+            python_requires=(
+                ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"),
             extras_require=extras_require,
             zip_safe=False,
         )