diff --git a/cibuildwheel/linux.py b/cibuildwheel/linux.py
index 043325c7..c2b37840 100644
--- a/cibuildwheel/linux.py
+++ b/cibuildwheel/linux.py
@@ -1,13 +1,8 @@
 from __future__ import print_function
-import os, subprocess, sys, uuid, textwrap
+import os, shlex, subprocess, sys, textwrap, uuid
 from collections import namedtuple
 from .util import prepare_command, get_build_verbosity_extra_flags
 
-try:
-    from shlex import quote as shlex_quote
-except ImportError:
-    from pipes import quote as shlex_quote
-
 
 def get_python_configurations(build_selector):
     PythonConfiguration = namedtuple('PythonConfiguration', ['identifier', 'path'])
@@ -132,14 +127,14 @@ def build(project_dir, output_dir, test_command, test_requires, test_extras, bef
             pybin_paths=' '.join(c.path+'/bin' for c in platform_configs),
             test_requires=' '.join(test_requires),
             test_extras=test_extras,
-            test_command=shlex_quote(
+            test_command=shlex.quote(
                 prepare_command(test_command, project='/project') if test_command else ''
             ),
-            before_build=shlex_quote(
+            before_build=shlex.quote(
                 prepare_command(before_build, project='/project') if before_build else ''
             ),
             build_verbosity_flag=' '.join(get_build_verbosity_extra_flags(build_verbosity)),
-            repair_command=shlex_quote(
+            repair_command=shlex.quote(
                 prepare_command(repair_command, wheel='"$1"', dest_dir='/tmp/repaired_wheels') if repair_command else ''
             ),
             environment_exports='\n'.join(environment.as_shell_commands()),
diff --git a/cibuildwheel/macos.py b/cibuildwheel/macos.py
index 7480990f..6e71d673 100644
--- a/cibuildwheel/macos.py
+++ b/cibuildwheel/macos.py
@@ -3,10 +3,6 @@ import tempfile
 import os, subprocess, shlex, sys, shutil
 from collections import namedtuple
 from glob import glob
-try:
-    from shlex import quote as shlex_quote
-except ImportError:
-    from pipes import quote as shlex_quote
 
 from .util import prepare_command, get_build_verbosity_extra_flags, download
 
@@ -46,7 +42,7 @@ def build(project_dir, output_dir, test_command, test_requires, test_extras, bef
         if shell:
             print('+ %s' % args)
         else:
-            print('+ ' + ' '.join(shlex_quote(a) for a in args))
+            print('+ ' + ' '.join(shlex.quote(a) for a in args))
 
         return subprocess.check_call(args, env=env, cwd=cwd, shell=shell)
 
diff --git a/cibuildwheel/util.py b/cibuildwheel/util.py
index 0aedbcac..14839ba3 100644
--- a/cibuildwheel/util.py
+++ b/cibuildwheel/util.py
@@ -1,13 +1,8 @@
 from fnmatch import fnmatch
 import warnings
-import os
+import os, urllib.request
 from time import sleep
 
-try:
-    from urllib.request import urlopen
-except ImportError:
-    from urllib2 import urlopen
-
 
 def prepare_command(command, **kwargs):
     '''
@@ -68,7 +63,7 @@ def download(url, dest):
     repeat_num = 3
     for i in range(repeat_num):
         try:
-            response = urlopen(url)
+            response = urllib.request.urlopen(url)
         except:
             if i == repeat_num - 1:
                 raise
diff --git a/cibuildwheel/windows.py b/cibuildwheel/windows.py
index c50c9810..26b93b7f 100644
--- a/cibuildwheel/windows.py
+++ b/cibuildwheel/windows.py
@@ -3,11 +3,6 @@ import os, tempfile, subprocess, shutil, sys
 from collections import namedtuple
 from glob import glob
 
-try:
-    from shlex import quote as shlex_quote
-except ImportError:
-    from pipes import quote as shlex_quote
-
 from .util import prepare_command, get_build_verbosity_extra_flags, download