diff --git a/.circleci/config.yml b/.circleci/config.yml
index f0315e5..947c2ec 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -3,7 +3,7 @@ jobs:
   install-and-test:
     docker:
       - image: cimg/python:3.11
-      - image: circleci/redis:5.0.0
+      - image: cimg/redis:5.0
     steps:
       - checkout
       - run: pip install -r requirements.txt
diff --git a/README.md b/README.md
index 8c76354..e43190d 100644
--- a/README.md
+++ b/README.md
@@ -32,13 +32,14 @@ redis_connection.get('ns:foo')
 
 Supported list
 
-| redis-py  | redis-namespace |
-| --- | --- |
-| 3.5.3 | 3.5.3.1 |
-| 3.0.1 | 3.0.1.1 |
-| 2.10.6 | 2.10.6.1 |
-| 2.10.5 | 2.10.5.2 |
-| 2.10.3 | 2.10.3.1 |
+| redis-py | redis-namespace |
+|----------|-----------------|
+| 4.5.5    | 4.5.5.1         |
+| 3.5.3    | 3.5.3.1         |
+| 3.0.1    | 3.0.1.1         |
+| 2.10.6   | 2.10.6.1        |
+| 2.10.5   | 2.10.5.2        |
+| 2.10.3   | 2.10.3.1        |
 
 
 [travis-url]: https://travis-ci.org/guokr/redis-namespace
diff --git a/redis_namespace/__init__.py b/redis_namespace/__init__.py
index 5ef8598..e42815c 100644
--- a/redis_namespace/__init__.py
+++ b/redis_namespace/__init__.py
@@ -12,7 +12,9 @@
 from redis.client import Pipeline as _Pipeline, PubSub as _PubSub, EMPTY_RESPONSE
 from redis.connection import ConnectionPool
 from redis.exceptions import ResponseError
-from redis._compat import nativestr, basestring
+
+
+nativestr = lambda x: x if isinstance(x, str) else x.decode('utf-8', 'replace')
 
 
 NAMESPACED_COMMANDS = {
@@ -252,7 +254,7 @@ def args_with_namespace(ns, *original_args):
         is_custom_match = False
         for i, a in enumerate(args):
             if (
-                isinstance(a, basestring) and str(a).lower() == 'match'
+                isinstance(a, str) and str(a).lower() == 'match'
                 or isinstance(a, bytes) and a.decode('utf-8').lower() == 'match'
             ):
                 args[i+1] = add_namespace(ns, args[i + 1])
@@ -286,7 +288,7 @@ def add_namespace(ns, key):
         return [add_namespace(ns, k) for k in key]
     elif isinstance(key, dict):
         return {add_namespace(ns, k): v for k, v in key.items()}
-    elif isinstance(key, basestring):
+    elif isinstance(key, str):
         return '{}{}'.format(ns, key)
     elif isinstance(key, bytes):
         return '{}{}'.format(ns, nativestr(key))
@@ -300,7 +302,7 @@ def rm_namespace(ns, key):
         return [rm_namespace(ns, k) for k in key]
     elif isinstance(key, dict):
         return {rm_namespace(ns, k): v for k, v in key.items()}
-    elif isinstance(key, (basestring, bytes)):
+    elif isinstance(key, (str, bytes)):
         return key[len(ns):]
     return key
 
@@ -348,7 +350,7 @@ def sort(self, name, start=None, num=None, by=None, get=None,
         args = [name, by, store]
         name, by, store = add_namespace(self._namespace, args)
         if get:
-            if isinstance(get, (basestring, bytes)):
+            if isinstance(get, (str, bytes)):
                 get = add_namespace(self._namespace, get)
             elif isinstance(get, (list, tuple)):
                 get = [add_namespace(self._namespace, i) if i != '#' else i for i in get]
diff --git a/redis_namespace/_version.py b/redis_namespace/_version.py
index e8fa884..7c63057 100644
--- a/redis_namespace/_version.py
+++ b/redis_namespace/_version.py
@@ -1,3 +1,3 @@
 """Version information."""
 
-__version__ = "3.5.3.1"
+__version__ = "4.5.5.1"
diff --git a/requirements.txt b/requirements.txt
index 3fc0632..54a7b14 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1 @@
-redis==3.5.3
+redis==4.5.5
diff --git a/tests/test_commands.py b/tests/test_commands.py
index 0238fa0..e145d42 100644
--- a/tests/test_commands.py
+++ b/tests/test_commands.py
@@ -1,4 +1,5 @@
 from __future__ import unicode_literals
+from string import ascii_letters
 import binascii
 import datetime
 import pytest
@@ -6,10 +7,8 @@
 import redis
 import time
 
-from redis._compat import (unichr, ascii_letters, iteritems, iterkeys,
-                           itervalues, long)
-from redis.client import parse_info
 from redis import exceptions
+from redis.client import parse_info
 
 from .conftest import skip_if_server_version_lt, skip_if_server_version_gte, with_bns
 
@@ -161,7 +160,7 @@ def test_ping(self, r):
 
     def test_slowlog_get(self, r, slowlog, ns):
         assert r.slowlog_reset()
-        unicode_string = unichr(3456) + 'abcd' + unichr(3421)
+        unicode_string = chr(3456) + 'abcd' + chr(3421)
         r.get(unicode_string)
         slowlog = r.slowlog_get()
         assert isinstance(slowlog, list)
@@ -398,7 +397,7 @@ def test_get_and_set(self, r):
         assert r.get('a') is None
         byte_string = b'value'
         integer = 5
-        unicode_string = unichr(3456) + 'abcd' + unichr(3421)
+        unicode_string = chr(3456) + 'abcd' + chr(3421)
         assert r.set('byte_string', byte_string)
         assert r.set('integer', 5)
         assert r.set('unicode_string', unicode_string)
@@ -485,7 +484,7 @@ def test_mget(self, r):
     def test_mset(self, r):
         d = {'a': b'1', 'b': b'2', 'c': b'3'}
         assert r.mset(d)
-        for k, v in iteritems(d):
+        for k, v in d.items():
             assert r[k] == v
 
     def test_msetnx(self, r):
@@ -493,7 +492,7 @@ def test_msetnx(self, r):
         assert r.msetnx(d)
         d2 = {'a': b'x', 'd': b'4'}
         assert not r.msetnx(d2)
-        for k, v in iteritems(d):
+        for k, v in d.items():
             assert r[k] == v
         assert r.get('d') is None
 
@@ -1369,7 +1368,7 @@ def test_hincrbyfloat(self, r):
     def test_hkeys(self, r):
         h = {b'a1': b'1', b'a2': b'2', b'a3': b'3'}
         r.hmset('a', h)
-        local_keys = list(iterkeys(h))
+        local_keys = list(h.keys())
         remote_keys = r.hkeys('a')
         assert (sorted(local_keys) == sorted(remote_keys))
 
@@ -1396,7 +1395,7 @@ def test_hsetnx(self, r):
     def test_hvals(self, r):
         h = {b'a1': b'1', b'a2': b'2', b'a3': b'3'}
         r.hmset('a', h)
-        local_vals = list(itervalues(h))
+        local_vals = list(h.values())
         remote_vals = r.hvals('a')
         assert sorted(local_vals) == sorted(remote_vals)
 
@@ -1949,8 +1948,8 @@ def test_xinfo_consumers(self, r):
         ]
 
         # we can't determine the idle time, so just make sure it's an int
-        assert isinstance(info[0].pop('idle'), (int, long))
-        assert isinstance(info[1].pop('idle'), (int, long))
+        assert isinstance(info[0].pop('idle'), int)
+        assert isinstance(info[1].pop('idle'), int)
         assert info == expected
 
     @skip_if_server_version_lt('5.0.0')
@@ -2297,14 +2296,14 @@ def test_binary_lists(self, r):
             b'foo\tbar\x07': [b'7', b'8', b'9'],
         }
         # fill in lists
-        for key, value in iteritems(mapping):
+        for key, value in mapping.items():
             r.rpush(key, *value)
 
         # check that KEYS returns all the keys as they are
-        assert sorted(r.keys('*')) == sorted(list(iterkeys(mapping)))
+        assert sorted(r.keys('*')) == sorted(list(mapping.keys()))
 
         # check that it is possible to get list content by key name
-        for key, value in iteritems(mapping):
+        for key, value in mapping.items():
             assert r.lrange(key, 0, -1) == value
 
     def test_22_info(self, r):
diff --git a/tests/test_encoding.py b/tests/test_encoding.py
index dd9d516..525a43d 100644
--- a/tests/test_encoding.py
+++ b/tests/test_encoding.py
@@ -3,7 +3,6 @@
 import redis
 import redis_namespace
 
-from redis._compat import unichr, unicode
 from .conftest import _get_client
 
 
@@ -13,14 +12,14 @@ def r(self, request):
         return _get_client(redis_namespace.Redis, request=request, decode_responses=True)
 
     def test_simple_encoding(self, r):
-        unicode_string = unichr(3456) + 'abcd' + unichr(3421)
+        unicode_string = chr(3456) + 'abcd' + chr(3421)
         r['unicode-string'] = unicode_string
         cached_val = r['unicode-string']
-        assert isinstance(cached_val, unicode)
+        assert isinstance(cached_val, str)
         assert unicode_string == cached_val
 
     def test_list_encoding(self, r):
-        unicode_string = unichr(3456) + 'abcd' + unichr(3421)
+        unicode_string = chr(3456) + 'abcd' + chr(3421)
         result = [unicode_string, unicode_string, unicode_string]
         r.rpush('a', *result)
         assert r.lrange('a', 0, -1) == result
diff --git a/tests/test_pipeline.py b/tests/test_pipeline.py
index 06abb9f..16af827 100644
--- a/tests/test_pipeline.py
+++ b/tests/test_pipeline.py
@@ -2,7 +2,6 @@
 import pytest
 
 import redis
-from redis._compat import unichr, unicode
 
 
 class TestPipeline(object):
@@ -111,7 +110,7 @@ def test_exec_error_raised(self, r, ns):
             pipe.set('a', 1).set('b', 2).lpush('c', 3).set('d', 4)
             with pytest.raises(redis.ResponseError) as ex:
                 pipe.execute()
-            assert unicode(ex.value).startswith('Command # 3 (LPUSH %sc 3) of '
+            assert str(ex.value).startswith('Command # 3 (LPUSH %sc 3) of '
                                                 'pipeline caused error: ' % ns)
 
             # make sure the pipe was restored to a working state
@@ -153,7 +152,7 @@ def test_parse_error_raised(self, r, ns):
             with pytest.raises(redis.ResponseError) as ex:
                 pipe.execute()
 
-            assert unicode(ex.value).startswith('Command # 2 (ZREM %sb) of '
+            assert str(ex.value).startswith('Command # 2 (ZREM %sb) of '
                                                 'pipeline caused error: ' % ns)
 
             # make sure the pipe was restored to a working state
@@ -236,13 +235,13 @@ def test_exec_error_in_no_transaction_pipeline(self, r, ns):
             with pytest.raises(redis.ResponseError) as ex:
                 pipe.execute()
 
-            assert unicode(ex.value).startswith('Command # 1 (LLEN %sa) of '
+            assert str(ex.value).startswith('Command # 1 (LLEN %sa) of '
                                                 'pipeline caused error: ' % ns)
 
         assert r['a'] == b'1'
 
     def test_exec_error_in_no_transaction_pipeline_unicode_command(self, r, ns):
-        key = unichr(3456) + 'abcd' + unichr(3421)
+        key = chr(3456) + 'abcd' + chr(3421)
         r[key] = 1
         with r.pipeline(transaction=False) as pipe:
             pipe.llen(key)
@@ -251,9 +250,9 @@ def test_exec_error_in_no_transaction_pipeline_unicode_command(self, r, ns):
             with pytest.raises(redis.ResponseError) as ex:
                 pipe.execute()
 
-            expected = unicode('Command # 1 (LLEN %s%s) of pipeline caused '
+            expected = str('Command # 1 (LLEN %s%s) of pipeline caused '
                                'error: ') % (ns, key)
-            assert unicode(ex.value).startswith(expected)
+            assert str(ex.value).startswith(expected)
 
         assert r[key] == b'1'
 
diff --git a/tests/test_pubsub.py b/tests/test_pubsub.py
index 6e1bc2a..f9c5ac5 100644
--- a/tests/test_pubsub.py
+++ b/tests/test_pubsub.py
@@ -4,7 +4,6 @@
 
 import redis
 from redis.exceptions import ConnectionError
-from redis._compat import basestring, unichr
 import redis_namespace
 
 from .conftest import _get_client
@@ -29,7 +28,7 @@ def make_message(type, channel, data, pattern=None):
         'type': type,
         'pattern': pattern and pattern.encode('utf-8') or None,
         'channel': channel and channel.encode('utf-8') or None,
-        'data': data.encode('utf-8') if isinstance(data, basestring) else data
+        'data': data.encode('utf-8') if isinstance(data, str) else data
     }
 
 
@@ -41,7 +40,7 @@ def make_subscribe_test_data(pubsub, type):
             'unsub_type': 'unsubscribe',
             'sub_func': pubsub.subscribe,
             'unsub_func': pubsub.unsubscribe,
-            'keys': ['foo', 'bar', 'uni' + unichr(4456) + 'code']
+            'keys': ['foo', 'bar', 'uni' + chr(4456) + 'code']
         }
     elif type == 'pattern':
         return {
@@ -50,7 +49,7 @@ def make_subscribe_test_data(pubsub, type):
             'unsub_type': 'punsubscribe',
             'sub_func': pubsub.psubscribe,
             'unsub_func': pubsub.punsubscribe,
-            'keys': ['f*', 'b*', 'uni' + unichr(4456) + '*']
+            'keys': ['f*', 'b*', 'uni' + chr(4456) + '*']
         }
     assert False, 'invalid subscribe type: %s' % type
 
@@ -268,7 +267,7 @@ def test_pattern_message_handler(self, r):
 
     def test_unicode_channel_message_handler(self, r):
         p = r.pubsub(ignore_subscribe_messages=True)
-        channel = 'uni' + unichr(4456) + 'code'
+        channel = 'uni' + chr(4456) + 'code'
         channels = {channel: self.message_handler}
         p.subscribe(**channels)
         assert r.publish(channel, 'test message') == 1
@@ -277,8 +276,8 @@ def test_unicode_channel_message_handler(self, r):
 
     def test_unicode_pattern_message_handler(self, r):
         p = r.pubsub(ignore_subscribe_messages=True)
-        pattern = 'uni' + unichr(4456) + '*'
-        channel = 'uni' + unichr(4456) + 'code'
+        pattern = 'uni' + chr(4456) + '*'
+        channel = 'uni' + chr(4456) + 'code'
         p.psubscribe(**{pattern: self.message_handler})
         assert r.publish(channel, 'test message') == 1
         assert wait_for_message(p) is None
@@ -297,9 +296,9 @@ def test_get_message_without_subscribe(self, r):
 class TestPubSubAutoDecoding(object):
     "These tests only validate that we get unicode values back"
 
-    channel = 'uni' + unichr(4456) + 'code'
-    pattern = 'uni' + unichr(4456) + '*'
-    data = 'abc' + unichr(4458) + '123'
+    channel = 'uni' + chr(4456) + 'code'
+    pattern = 'uni' + chr(4456) + '*'
+    data = 'abc' + chr(4458) + '123'
 
     def make_message(self, type, channel, data, pattern=None):
         return {
diff --git a/tests/test_sentinel.py b/tests/test_sentinel.py
index 1081e2b..b2c35fc 100644
--- a/tests/test_sentinel.py
+++ b/tests/test_sentinel.py
@@ -3,7 +3,6 @@
 from redis import exceptions
 from redis.sentinel import (Sentinel, SentinelConnectionPool,
                             MasterNotFoundError, SlaveNotFoundError)
-from redis._compat import next
 import redis.sentinel