diff --git a/zulip/integrations/bridge_with_matrix/matrix_bridge.py b/zulip/integrations/bridge_with_matrix/matrix_bridge.py
index 133a496..92dca5f 100644
--- a/zulip/integrations/bridge_with_matrix/matrix_bridge.py
+++ b/zulip/integrations/bridge_with_matrix/matrix_bridge.py
@@ -7,7 +7,7 @@ import zulip
 import sys
 import argparse
 import re
-from six.moves import configparser
+import configparser
 
 from collections import OrderedDict
 
diff --git a/zulip/integrations/codebase/zulip_codebase_mirror b/zulip/integrations/codebase/zulip_codebase_mirror
index 73d2ffb..1ae17b1 100755
--- a/zulip/integrations/codebase/zulip_codebase_mirror
+++ b/zulip/integrations/codebase/zulip_codebase_mirror
@@ -31,7 +31,6 @@ VERSION = "0.9"
 
 if config.ZULIP_API_PATH is not None:
     sys.path.append(config.ZULIP_API_PATH)
-import six
 import zulip
 from typing import Any, List, Dict, Optional
 
@@ -301,7 +300,7 @@ def check_permissions():
         sys.stderr.write(str(e))
 
 if __name__ == "__main__":
-    if not isinstance(config.RESUME_FILE, six.string_types):
+    if not isinstance(config.RESUME_FILE, str):
         sys.stderr.write("RESUME_FILE path not given; refusing to continue")
     check_permissions()
     if config.LOG_FILE:
diff --git a/zulip/integrations/google/google-calendar b/zulip/integrations/google/google-calendar
index 3e93939..4675ef8 100755
--- a/zulip/integrations/google/google-calendar
+++ b/zulip/integrations/google/google-calendar
@@ -10,7 +10,7 @@ import logging
 import argparse
 import os
 import pytz
-from six.moves import urllib
+import urllib
 import sys
 import time
 import traceback
diff --git a/zulip/integrations/hg/zulip_changegroup.py b/zulip/integrations/hg/zulip_changegroup.py
index aa6e257..d671aeb 100755
--- a/zulip/integrations/hg/zulip_changegroup.py
+++ b/zulip/integrations/hg/zulip_changegroup.py
@@ -8,7 +8,6 @@
 
 import zulip
 import sys
-from six.moves import range
 from typing import Any, Optional, Text
 from mercurial import ui, repository as repo
 
diff --git a/zulip/integrations/jabber/jabber_mirror_backend.py b/zulip/integrations/jabber/jabber_mirror_backend.py
index 6b14838..37df59b 100755
--- a/zulip/integrations/jabber/jabber_mirror_backend.py
+++ b/zulip/integrations/jabber/jabber_mirror_backend.py
@@ -46,7 +46,7 @@ import optparse
 from sleekxmpp import ClientXMPP, InvalidJID, JID
 from sleekxmpp.stanza import Message as JabberMessage
 from sleekxmpp.exceptions import IqError, IqTimeout
-from six.moves.configparser import SafeConfigParser
+from configparser import SafeConfigParser
 import getpass
 import os
 import sys
diff --git a/zulip/integrations/perforce/git_p4.py b/zulip/integrations/perforce/git_p4.py
index c7d02ba..7b86cd0 100755
--- a/zulip/integrations/perforce/git_p4.py
+++ b/zulip/integrations/perforce/git_p4.py
@@ -8,10 +8,6 @@
 # License: MIT <http://www.opensource.org/licenses/mit-license.php>
 #
 import sys
-import six
-from six.moves import input
-from six.moves import range
-from six.moves import zip
 if sys.hexversion < 0x02040000:
     # The limiter is the subprocess module
     sys.stderr.write("git-p4: requires Python 2.4 or later.\n")
@@ -58,7 +54,7 @@ def p4_build_cmd(cmd):
     """
     real_cmd = ["p4"]
 
-    if isinstance(cmd, six.string_types):
+    if isinstance(cmd, str):
         real_cmd = ' '.join(real_cmd) + ' ' + cmd
     else:
         real_cmd += cmd
@@ -97,7 +93,7 @@ def write_pipe(c, stdin):
     if verbose:
         sys.stderr.write('Writing pipe: %s\n' % str(c))
 
-    expand = isinstance(c, six.string_types)
+    expand = isinstance(c, str)
     p = subprocess.Popen(c, stdin=subprocess.PIPE, shell=expand)
     pipe = p.stdin
     val = pipe.write(stdin)
@@ -115,7 +111,7 @@ def read_pipe(c, ignore_error=False):
     if verbose:
         sys.stderr.write('Reading pipe: %s\n' % str(c))
 
-    expand = isinstance(c, six.string_types)
+    expand = isinstance(c, str)
     p = subprocess.Popen(c, stdout=subprocess.PIPE, shell=expand)
     pipe = p.stdout
     val = pipe.read()
@@ -132,7 +128,7 @@ def read_pipe_lines(c):
     if verbose:
         sys.stderr.write('Reading pipe: %s\n' % str(c))
 
-    expand = isinstance(c, six.string_types)
+    expand = isinstance(c, str)
     p = subprocess.Popen(c, stdout=subprocess.PIPE, shell=expand)
     pipe = p.stdout
     val = pipe.readlines()
@@ -175,7 +171,7 @@ def p4_has_move_command():
     return True
 
 def system(cmd):
-    expand = isinstance(cmd, six.string_types)
+    expand = isinstance(cmd, str)
     if verbose:
         sys.stderr.write("executing %s\n" % str(cmd))
     retcode = subprocess.call(cmd, shell=expand)
@@ -185,7 +181,7 @@ def system(cmd):
 def p4_system(cmd):
     """Specifically invoke p4 as the system command. """
     real_cmd = p4_build_cmd(cmd)
-    expand = isinstance(real_cmd, six.string_types)
+    expand = isinstance(real_cmd, str)
     retcode = subprocess.call(real_cmd, shell=expand)
     if retcode:
         raise CalledProcessError(retcode, real_cmd)
@@ -362,7 +358,7 @@ def getP4OpenedType(file):
 # Return the set of all p4 labels
 def getP4Labels(depotPaths):
     labels = set()
-    if isinstance(depotPaths, six.string_types):
+    if isinstance(depotPaths, str):
         depotPaths = [depotPaths]
 
     for l in p4CmdList(["labels"] + ["%s..." % p for p in depotPaths]):
@@ -429,7 +425,7 @@ def isModeExecChanged(src_mode, dst_mode):
 
 def p4CmdList(cmd, stdin=None, stdin_mode='w+b', cb=None):
 
-    if isinstance(cmd, six.string_types):
+    if isinstance(cmd, str):
         cmd = "-G " + cmd
         expand = True
     else:
@@ -446,7 +442,7 @@ def p4CmdList(cmd, stdin=None, stdin_mode='w+b', cb=None):
     stdin_file = None
     if stdin is not None:
         stdin_file = tempfile.TemporaryFile(prefix='p4-stdin', mode=stdin_mode)
-        if isinstance(stdin, six.string_types):
+        if isinstance(stdin, str):
             stdin_file.write(stdin)
         else:
             for i in stdin:
diff --git a/zulip/integrations/rss/rss-bot b/zulip/integrations/rss/rss-bot
index 60db9f3..93c740e 100755
--- a/zulip/integrations/rss/rss-bot
+++ b/zulip/integrations/rss/rss-bot
@@ -7,14 +7,14 @@
 import calendar
 import errno
 import hashlib
-from six.moves.html_parser import HTMLParser
+from html.parser import HTMLParser
 import logging
 import argparse
 import os
 import re
 import sys
 import time
-from six.moves import urllib
+import urllib
 from typing import Dict, List, Tuple, Any
 
 import feedparser
diff --git a/zulip/integrations/twitter/twitter-bot b/zulip/integrations/twitter/twitter-bot
index a7ae7eb..db34a67 100755
--- a/zulip/integrations/twitter/twitter-bot
+++ b/zulip/integrations/twitter/twitter-bot
@@ -6,7 +6,7 @@
 import os
 import sys
 import argparse
-from six.moves.configparser import ConfigParser, NoSectionError, NoOptionError
+from configparser import ConfigParser, NoSectionError, NoOptionError
 
 import zulip
 VERSION = "0.9"
diff --git a/zulip/integrations/zephyr/check-mirroring b/zulip/integrations/zephyr/check-mirroring
index 88a85c1..615cba9 100755
--- a/zulip/integrations/zephyr/check-mirroring
+++ b/zulip/integrations/zephyr/check-mirroring
@@ -9,7 +9,6 @@ import subprocess
 import hashlib
 import zephyr
 import zulip
-from six.moves import range
 
 if False:
     from typing import Any, Dict, List, Set, Tuple
diff --git a/zulip/integrations/zephyr/zephyr_mirror_backend.py b/zulip/integrations/zephyr/zephyr_mirror_backend.py
index c5a205f..2b2cac2 100755
--- a/zulip/integrations/zephyr/zephyr_mirror_backend.py
+++ b/zulip/integrations/zephyr/zephyr_mirror_backend.py
@@ -4,8 +4,6 @@ from typing import IO, Any, Dict, List, Text, Union, Set, Tuple, Optional, cast
 from types import FrameType
 
 import sys
-from six.moves import map
-from six.moves import range
 import json
 import re
 import time