diff --git a/Doc/library/xmlrpc.client.rst b/Doc/library/xmlrpc.client.rst
index e72770a..1871c99 100644
--- a/Doc/library/xmlrpc.client.rst
+++ b/Doc/library/xmlrpc.client.rst
@@ -8,7 +8,7 @@
 
 
 .. XXX Not everything is documented yet.  It might be good to describe
-   Marshaller, Unmarshaller, getparser, dumps, loads, and Transport.
+   Marshaller, Unmarshaller, getparser and Transport.
 
 **Source code:** :source:`Lib/xmlrpc/client.py`
 
@@ -21,7 +21,12 @@
 between conformable Python objects and XML on the wire.
 
 
-.. class:: ServerProxy(uri, transport=None, encoding=None, verbose=False, allow_none=False, use_datetime=False)
+.. class:: ServerProxy(uri, transport=None, encoding=None, verbose=False, \
+                       allow_none=False, use_datetime=False, \
+                       use_builtin_types=False)
+
+   .. versionchanged:: 3.3
+      The *use_builtin_types* flag was added.
 
    A :class:`ServerProxy` instance is an object that manages communication with a
    remote XML-RPC server.  The required first argument is a URI (Uniform Resource
@@ -34,9 +39,13 @@
    XML; the default behaviour is for ``None`` to raise a :exc:`TypeError`. This is
    a commonly-used extension to the XML-RPC specification, but isn't supported by
    all clients and servers; see http://ontosys.com/xml-rpc/extensions.php for a
-   description.  The *use_datetime* flag can be used to cause date/time values to
-   be presented as :class:`datetime.datetime` objects; this is false by default.
-   :class:`datetime.datetime` objects may be passed to calls.
+   description.  The *use_builtin_types* flag can be used to cause date/time values
+   to be presented as :class:`datetime.datetime` objects and binary data to be
+   presented as :class:`bytes` objects; this flag is false by default.
+   :class:`datetime.datetime` and :class:`bytes` objects may be passed to calls.
+
+   The obsolete *use_datetime* flag is similar to *use_builtin_types* but it
+   applies only to date/time values.
 
    Both the HTTP and HTTPS transports support the URL syntax extension for HTTP
    Basic Authentication: ``http://user:pass@host:port/path``.  The  ``user:pass``
@@ -78,12 +87,12 @@
    |                                 | only their *__dict__* attribute is          |
    |                                 | transmitted.                                |
    +---------------------------------+---------------------------------------------+
-   | :const:`dates`                  | in seconds since the epoch (pass in an      |
-   |                                 | instance of the :class:`DateTime` class) or |
+   | :const:`dates`                  | In seconds since the epoch.  Pass in an     |
+   |                                 | instance of the :class:`DateTime` class or  |
    |                                 | a :class:`datetime.datetime` instance.      |
    +---------------------------------+---------------------------------------------+
-   | :const:`binary data`            | pass in an instance of the :class:`Binary`  |
-   |                                 | wrapper class                               |
+   | :const:`binary data`            | Pass in an instance of the :class:`Binary`  |
+   |                                 | wrapper class or a :class:`bytes` instance. |
    +---------------------------------+---------------------------------------------+
 
    This is the full set of data types supported by XML-RPC.  Method calls may also
@@ -98,8 +107,9 @@
    ensure that the string is free of characters that aren't allowed in XML, such as
    the control characters with ASCII values between 0 and 31 (except, of course,
    tab, newline and carriage return); failing to do this will result in an XML-RPC
-   request that isn't well-formed XML.  If you have to pass arbitrary strings via
-   XML-RPC, use the :class:`Binary` wrapper class described below.
+   request that isn't well-formed XML.  If you have to pass arbitrary bytes
+   via XML-RPC, use the :class:`bytes` class or the class:`Binary` wrapper class
+   described below.
 
    :class:`Server` is retained as an alias for :class:`ServerProxy` for backwards
    compatibility.  New code should use :class:`ServerProxy`.
@@ -249,7 +259,7 @@
 Binary Objects
 --------------
 
-This class may be initialized from string data (which may include NULs). The
+This class may be initialized from bytes data (which may include NULs). The
 primary access to the content of a :class:`Binary` object is provided by an
 attribute:
 
@@ -257,15 +267,15 @@
 .. attribute:: Binary.data
 
    The binary data encapsulated by the :class:`Binary` instance.  The data is
-   provided as an 8-bit string.
+   provided as a :class:`bytes` object.
 
 :class:`Binary` objects have the following methods, supported mainly for
 internal use by the marshalling/unmarshalling code:
 
 
-.. method:: Binary.decode(string)
+.. method:: Binary.decode(bytes)
 
-   Accept a base64 string and decode it as the instance's new data.
+   Accept a base64 :class:`bytes` object and decode it as the instance's new data.
 
 
 .. method:: Binary.encode(out)
@@ -471,14 +481,21 @@
    it via an extension,  provide a true value for *allow_none*.
 
 
-.. function:: loads(data, use_datetime=False)
+.. function:: loads(data, use_datetime=False, use_builtin_types=False)
 
    Convert an XML-RPC request or response into Python objects, a ``(params,
    methodname)``.  *params* is a tuple of argument; *methodname* is a string, or
    ``None`` if no method name is present in the packet. If the XML-RPC packet
    represents a fault condition, this function will raise a :exc:`Fault` exception.
-   The *use_datetime* flag can be used to cause date/time values to be presented as
-   :class:`datetime.datetime` objects; this is false by default.
+   The *use_builtin_types* flag can be used to cause date/time values to be
+   presented as :class:`datetime.datetime` objects and binary data to be
+   presented as :class:`bytes` objects; this flag is false by default.
+
+   The obsolete *use_datetime* flag is similar to *use_builtin_types* but it
+   applies only to date/time values.
+
+   .. versionchanged:: 3.3
+      The *use_builtin_types* flag was added.
 
 
 .. _xmlrpc-client-example:
diff --git a/Lib/test/test_xmlrpc.py b/Lib/test/test_xmlrpc.py
index e97420b..76723fa 100644
--- a/Lib/test/test_xmlrpc.py
+++ b/Lib/test/test_xmlrpc.py
@@ -24,6 +24,8 @@
           'ashortlong': 2,
           'anotherlist': ['.zyx.41'],
           'abase64': xmlrpclib.Binary(b"my dog has fleas"),
+          'b64bytes': b"my dog has fleas",
+          'b64bytearray': bytearray(b"my dog has fleas"),
           'boolean': False,
           'unicode': '\u4000\u6000\u8000',
           'ukey\u4000': 'regular value',
@@ -44,27 +46,54 @@
     def test_dump_bare_datetime(self):
         # This checks that an unwrapped datetime.date object can be handled
         # by the marshalling code.  This can't be done via test_dump_load()
-        # since with use_datetime set to 1 the unmarshaller would create
+        # since with use_builtin_types set to 1 the unmarshaller would create
         # datetime objects for the 'datetime[123]' keys as well
         dt = datetime.datetime(2005, 2, 10, 11, 41, 23)
+        self.assertEqual(dt, xmlrpclib.DateTime('20050210T11:41:23'))
         s = xmlrpclib.dumps((dt,))
-        (newdt,), m = xmlrpclib.loads(s, use_datetime=1)
-        self.assertEqual(newdt, dt)
-        self.assertEqual(m, None)
 
-        (newdt,), m = xmlrpclib.loads(s, use_datetime=0)
-        self.assertEqual(newdt, xmlrpclib.DateTime('20050210T11:41:23'))
+        result, m = xmlrpclib.loads(s, use_builtin_types=True)
+        (newdt,) = result
+        self.assertEqual(newdt, dt)
+        self.assertIs(type(newdt), datetime.datetime)
+        self.assertIsNone(m)
+
+        result, m = xmlrpclib.loads(s, use_builtin_types=False)
+        (newdt,) = result
+        self.assertEqual(newdt, dt)
+        self.assertIs(type(newdt), xmlrpclib.DateTime)
+        self.assertIsNone(m)
+
+        result, m = xmlrpclib.loads(s, use_datetime=True)
+        (newdt,) = result
+        self.assertEqual(newdt, dt)
+        self.assertIs(type(newdt), datetime.datetime)
+        self.assertIsNone(m)
+
+        result, m = xmlrpclib.loads(s, use_datetime=False)
+        (newdt,) = result
+        self.assertEqual(newdt, dt)
+        self.assertIs(type(newdt), xmlrpclib.DateTime)
+        self.assertIsNone(m)
+
 
     def test_datetime_before_1900(self):
         # same as before but with a date before 1900
         dt = datetime.datetime(1,  2, 10, 11, 41, 23)
+        self.assertEqual(dt, xmlrpclib.DateTime('00010210T11:41:23'))
         s = xmlrpclib.dumps((dt,))
-        (newdt,), m = xmlrpclib.loads(s, use_datetime=1)
-        self.assertEqual(newdt, dt)
-        self.assertEqual(m, None)
 
-        (newdt,), m = xmlrpclib.loads(s, use_datetime=0)
-        self.assertEqual(newdt, xmlrpclib.DateTime('00010210T11:41:23'))
+        result, m = xmlrpclib.loads(s, use_builtin_types=True)
+        (newdt,) = result
+        self.assertEqual(newdt, dt)
+        self.assertIs(type(newdt), datetime.datetime)
+        self.assertIsNone(m)
+
+        result, m = xmlrpclib.loads(s, use_builtin_types=False)
+        (newdt,) = result
+        self.assertEqual(newdt, dt)
+        self.assertIs(type(newdt), xmlrpclib.DateTime)
+        self.assertIsNone(m)
 
     def test_bug_1164912 (self):
         d = xmlrpclib.DateTime()
@@ -133,6 +162,25 @@
                           xmlrpclib.loads(strg)[0][0])
         self.assertRaises(TypeError, xmlrpclib.dumps, (arg1,))
 
+    def test_dump_bytes(self):
+        sample = b"my dog has fleas"
+        self.assertEqual(sample, xmlrpclib.Binary(sample))
+        for type_ in bytes, bytearray, xmlrpclib.Binary:
+            value = type_(sample)
+            s = xmlrpclib.dumps((value,))
+
+            result, m = xmlrpclib.loads(s, use_builtin_types=True)
+            (newvalue,) = result
+            self.assertEqual(newvalue, sample)
+            self.assertIs(type(newvalue), bytes)
+            self.assertIsNone(m)
+
+            result, m = xmlrpclib.loads(s, use_builtin_types=False)
+            (newvalue,) = result
+            self.assertEqual(newvalue, sample)
+            self.assertIs(type(newvalue), xmlrpclib.Binary)
+            self.assertIsNone(m)
+
     def test_get_host_info(self):
         # see bug #3613, this raised a TypeError
         transp = xmlrpc.client.Transport()
@@ -140,9 +188,6 @@
                           ('host.tld',
                            [('Authorization', 'Basic dXNlcg==')], {}))
 
-    def test_dump_bytes(self):
-        self.assertRaises(TypeError, xmlrpclib.dumps, (b"my dog has fleas",))
-
     def test_ssl_presence(self):
         try:
             import ssl
diff --git a/Lib/xmlrpc/client.py b/Lib/xmlrpc/client.py
index ff931e7..59f7546 100644
--- a/Lib/xmlrpc/client.py
+++ b/Lib/xmlrpc/client.py
@@ -386,8 +386,8 @@
         if data is None:
             data = b""
         else:
-            if not isinstance(data, bytes):
-                raise TypeError("expected bytes, not %s" %
+            if not isinstance(data, (bytes, bytearray)):
+                raise TypeError("expected bytes or bytearray, not %s" %
                                 data.__class__.__name__)
             data = bytes(data)  # Make a copy of the bytes!
         self.data = data
@@ -559,6 +559,14 @@
         write("</string></value>\n")
     dispatch[str] = dump_unicode
 
+    def dump_bytes(self, value, write):
+        write("<value><base64>\n")
+        encoded = base64.encodebytes(value)
+        write(encoded.decode('ascii'))
+        write("</base64></value>\n")
+    dispatch[bytes] = dump_bytes
+    dispatch[bytearray] = dump_bytes
+
     def dump_array(self, value, write):
         i = id(value)
         if i in self.memo:
@@ -629,7 +637,7 @@
     # and again, if you don't understand what's going on in here,
     # that's perfectly ok.
 
-    def __init__(self, use_datetime=False):
+    def __init__(self, use_datetime=False, use_builtin_types=False):
         self._type = None
         self._stack = []
         self._marks = []
@@ -637,7 +645,8 @@
         self._methodname = None
         self._encoding = "utf-8"
         self.append = self._stack.append
-        self._use_datetime = use_datetime
+        self._use_datetime = use_builtin_types or use_datetime
+        self._use_bytes = use_builtin_types
 
     def close(self):
         # return response tuple and target method
@@ -749,6 +758,8 @@
     def end_base64(self, data):
         value = Binary()
         value.decode(data.encode("ascii"))
+        if self._use_bytes:
+            value = value.data
         self.append(value)
         self._value = 0
     dispatch["base64"] = end_base64
@@ -860,21 +871,26 @@
 #
 # return A (parser, unmarshaller) tuple.
 
-def getparser(use_datetime=False):
+def getparser(use_datetime=False, use_builtin_types=False):
     """getparser() -> parser, unmarshaller
 
     Create an instance of the fastest available parser, and attach it
     to an unmarshalling object.  Return both objects.
     """
     if FastParser and FastUnmarshaller:
-        if use_datetime:
+        if use_builtin_types:
             mkdatetime = _datetime_type
+            mkbytes = base64.decodebytes
+        elif use_datetime:
+            mkdatetime = _datetime_type
+            mkbytes = _binary
         else:
             mkdatetime = _datetime
-        target = FastUnmarshaller(True, False, _binary, mkdatetime, Fault)
+            mkbytes = _binary
+        target = FastUnmarshaller(True, False, mkbytes, mkdatetime, Fault)
         parser = FastParser(target)
     else:
-        target = Unmarshaller(use_datetime=use_datetime)
+        target = Unmarshaller(use_datetime=use_datetime, use_builtin_types=use_builtin_types)
         if FastParser:
             parser = FastParser(target)
         else:
@@ -912,7 +928,7 @@
 
         encoding: the packet encoding (default is UTF-8)
 
-    All 8-bit strings in the data structure are assumed to use the
+    All byte strings in the data structure are assumed to use the
     packet encoding.  Unicode strings are automatically converted,
     where necessary.
     """
@@ -971,7 +987,7 @@
 #     (None if not present).
 # @see Fault
 
-def loads(data, use_datetime=False):
+def loads(data, use_datetime=False, use_builtin_types=False):
     """data -> unmarshalled data, method name
 
     Convert an XML-RPC packet to unmarshalled data plus a method
@@ -980,7 +996,7 @@
     If the XML-RPC packet represents a fault condition, this function
     raises a Fault exception.
     """
-    p, u = getparser(use_datetime=use_datetime)
+    p, u = getparser(use_datetime=use_datetime, use_builtin_types=use_builtin_types)
     p.feed(data)
     p.close()
     return u.close(), u.getmethodname()
@@ -1092,8 +1108,9 @@
     # that they can decode such a request
     encode_threshold = None #None = don't encode
 
-    def __init__(self, use_datetime=False):
+    def __init__(self, use_datetime=False, use_builtin_types=False):
         self._use_datetime = use_datetime
+        self._use_builtin_types = use_builtin_types
         self._connection = (None, None)
         self._extra_headers = []
 
@@ -1154,7 +1171,8 @@
 
     def getparser(self):
         # get parser and unmarshaller
-        return getparser(use_datetime=self._use_datetime)
+        return getparser(use_datetime=self._use_datetime,
+                         use_builtin_types=self._use_builtin_types)
 
     ##
     # Get authorization info from host parameter
@@ -1361,7 +1379,7 @@
     """
 
     def __init__(self, uri, transport=None, encoding=None, verbose=False,
-                 allow_none=False, use_datetime=False):
+                 allow_none=False, use_datetime=False, use_builtin_types=False):
         # establish a "logical" server connection
 
         # get the url
@@ -1375,9 +1393,11 @@
 
         if transport is None:
             if type == "https":
-                transport = SafeTransport(use_datetime=use_datetime)
+                handler = SafeTransport
             else:
-                transport = Transport(use_datetime=use_datetime)
+                handler = Transport
+            transport = handler(use_datetime=use_datetime,
+                                use_builtin_types=use_builtin_types)
         self.__transport = transport
 
         self.__encoding = encoding or 'utf-8'
diff --git a/Misc/NEWS b/Misc/NEWS
index ed713e3..3ed7e7a 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -374,6 +374,8 @@
 Library
 -------
 
+- Issue #13297: Use bytes type to send and receive binary data through XMLRPC.
+
 - Issue #6397: Support "/dev/poll" polling objects in select module,
   under Solaris & derivatives.