diff --git a/lower-constraints.txt b/lower-constraints.txt
index 287f7d459..25f71e45a 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -71,7 +71,7 @@ python-cinderclient==3.3.0
 python-dateutil==2.5.3
 python-keystoneclient==3.22.0
 python-mimeparse==1.6.0
-python-novaclient==15.1.0
+python-novaclient==17.0.0
 python-subunit==1.0.0
 pytz==2013.6
 PyYAML==3.13
diff --git a/openstackclient/compute/v2/server.py b/openstackclient/compute/v2/server.py
index 50299d65d..fa27f68c8 100644
--- a/openstackclient/compute/v2/server.py
+++ b/openstackclient/compute/v2/server.py
@@ -513,27 +513,27 @@ class AddServerVolume(command.Command):
             '--tag',
             metavar='<tag>',
             help=_(
-                "Tag for the attached volume. "
-                "(Supported by API versions '2.49' - '2.latest')"
+                'Tag for the attached volume '
+                '(supported by --os-compute-api-version 2.49 or above)'
             ),
         )
+        # TODO(stephenfin): These should be called 'delete-on-termination' and
+        # 'preserve-on-termination'
         termination_group = parser.add_mutually_exclusive_group()
         termination_group.add_argument(
             '--enable-delete-on-termination',
             action='store_true',
             help=_(
-                "Specify if the attached volume should be deleted when the "
-                "server is destroyed. "
-                "(Supported by API versions '2.79' - '2.latest')"
+                'Delete the volume when the server is destroyed '
+                '(supported by --os-compute-api-version 2.79 or above)'
             ),
         )
         termination_group.add_argument(
             '--disable-delete-on-termination',
             action='store_true',
             help=_(
-                "Specify if the attached volume should not be deleted when "
-                "the server is destroyed. "
-                "(Supported by API versions '2.79' - '2.latest')"
+                'Do not delete the volume when the server is destroyed '
+                '(supported by --os-compute-api-version 2.79 or above)'
             ),
         )
         return parser
diff --git a/openstackclient/compute/v2/server_volume.py b/openstackclient/compute/v2/server_volume.py
index 8a931ae5a..b53c92fe5 100644
--- a/openstackclient/compute/v2/server_volume.py
+++ b/openstackclient/compute/v2/server_volume.py
@@ -16,6 +16,7 @@
 
 from novaclient import api_versions
 from osc_lib.command import command
+from osc_lib import exceptions
 from osc_lib import utils
 
 from openstackclient.i18n import _
@@ -71,3 +72,69 @@ class ListServerVolume(command.Lister):
                 ) for s in volumes
             ),
         )
+
+
+class UpdateServerVolume(command.Command):
+    """Update a volume attachment on the server."""
+
+    def get_parser(self, prog_name):
+        parser = super(UpdateServerVolume, self).get_parser(prog_name)
+        parser.add_argument(
+            'server',
+            help=_('Server to update volume for (name or ID)'),
+        )
+        parser.add_argument(
+            'volume',
+            help=_('Volume (ID)'),
+        )
+        termination_group = parser.add_mutually_exclusive_group()
+        termination_group.add_argument(
+            '--delete-on-termination',
+            action='store_true',
+            dest='delete_on_termination',
+            default=None,
+            help=_(
+                'Delete the volume when the server is destroyed '
+                '(supported by --os-compute-api-version 2.85 or above)'
+            ),
+        )
+        termination_group.add_argument(
+            '--preserve-on-termination',
+            action='store_false',
+            dest='delete_on_termination',
+            help=_(
+                'Preserve the volume when the server is destroyed '
+                '(supported by --os-compute-api-version 2.85 or above)'
+            ),
+        )
+        return parser
+
+    def take_action(self, parsed_args):
+
+        compute_client = self.app.client_manager.compute
+
+        if parsed_args.delete_on_termination is not None:
+            if compute_client.api_version < api_versions.APIVersion('2.85'):
+                msg = _(
+                    '--os-compute-api-version 2.85 or greater is required to '
+                    'support the --(no-)delete-on-termination option'
+                )
+                raise exceptions.CommandError(msg)
+
+            server = utils.find_resource(
+                compute_client.servers,
+                parsed_args.server,
+            )
+
+            # NOTE(stephenfin): This may look silly, and that's because it is.
+            # This API was originally used only for the swapping volumes, which
+            # is an internal operation that should only be done by
+            # orchestration software rather than a human. We're not going to
+            # expose that, but we are going to expose the ability to change the
+            # delete on termination behavior.
+            compute_client.volumes.update_server_volume(
+                server.id,
+                parsed_args.volume,
+                parsed_args.volume,
+                delete_on_termination=parsed_args.delete_on_termination,
+            )
diff --git a/openstackclient/tests/unit/compute/v2/test_server_volume.py b/openstackclient/tests/unit/compute/v2/test_server_volume.py
index d09c28745..4d4916b7e 100644
--- a/openstackclient/tests/unit/compute/v2/test_server_volume.py
+++ b/openstackclient/tests/unit/compute/v2/test_server_volume.py
@@ -12,6 +12,7 @@
 #
 
 from novaclient import api_versions
+from osc_lib import exceptions
 
 from openstackclient.compute.v2 import server_volume
 from openstackclient.tests.unit.compute.v2 import fakes as compute_fakes
@@ -165,3 +166,122 @@ class TestServerVolumeList(TestServerVolume):
         )
         self.servers_volumes_mock.get_server_volumes.assert_called_once_with(
             self.server.id)
+
+
+class TestServerVolumeUpdate(TestServerVolume):
+
+    def setUp(self):
+        super().setUp()
+
+        self.server = compute_fakes.FakeServer.create_one_server()
+        self.servers_mock.get.return_value = self.server
+
+        # Get the command object to test
+        self.cmd = server_volume.UpdateServerVolume(self.app, None)
+
+    def test_server_volume_update(self):
+
+        arglist = [
+            self.server.id,
+            'foo',
+        ]
+        verifylist = [
+            ('server', self.server.id),
+            ('volume', 'foo'),
+            ('delete_on_termination', None),
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        result = self.cmd.take_action(parsed_args)
+
+        # This is a no-op
+        self.servers_volumes_mock.update_server_volume.assert_not_called()
+        self.assertIsNone(result)
+
+    def test_server_volume_update_with_delete_on_termination(self):
+        self.app.client_manager.compute.api_version = \
+            api_versions.APIVersion('2.85')
+
+        arglist = [
+            self.server.id,
+            'foo',
+            '--delete-on-termination',
+        ]
+        verifylist = [
+            ('server', self.server.id),
+            ('volume', 'foo'),
+            ('delete_on_termination', True),
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        result = self.cmd.take_action(parsed_args)
+
+        self.servers_volumes_mock.update_server_volume.assert_called_once_with(
+            self.server.id, 'foo', 'foo',
+            delete_on_termination=True)
+        self.assertIsNone(result)
+
+    def test_server_volume_update_with_preserve_on_termination(self):
+        self.app.client_manager.compute.api_version = \
+            api_versions.APIVersion('2.85')
+
+        arglist = [
+            self.server.id,
+            'foo',
+            '--preserve-on-termination',
+        ]
+        verifylist = [
+            ('server', self.server.id),
+            ('volume', 'foo'),
+            ('delete_on_termination', False),
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        result = self.cmd.take_action(parsed_args)
+
+        self.servers_volumes_mock.update_server_volume.assert_called_once_with(
+            self.server.id, 'foo', 'foo',
+            delete_on_termination=False)
+        self.assertIsNone(result)
+
+    def test_server_volume_update_with_delete_on_termination_pre_v285(self):
+        self.app.client_manager.compute.api_version = \
+            api_versions.APIVersion('2.84')
+
+        arglist = [
+            self.server.id,
+            'foo',
+            '--delete-on-termination',
+        ]
+        verifylist = [
+            ('server', self.server.id),
+            ('volume', 'foo'),
+            ('delete_on_termination', True),
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        self.assertRaises(
+            exceptions.CommandError,
+            self.cmd.take_action,
+            parsed_args)
+
+    def test_server_volume_update_with_preserve_on_termination_pre_v285(self):
+        self.app.client_manager.compute.api_version = \
+            api_versions.APIVersion('2.84')
+
+        arglist = [
+            self.server.id,
+            'foo',
+            '--preserve-on-termination',
+        ]
+        verifylist = [
+            ('server', self.server.id),
+            ('volume', 'foo'),
+            ('delete_on_termination', False),
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        self.assertRaises(
+            exceptions.CommandError,
+            self.cmd.take_action,
+            parsed_args)
diff --git a/releasenotes/notes/add-server-volume-update-89740dca61596dd1.yaml b/releasenotes/notes/add-server-volume-update-89740dca61596dd1.yaml
index d1c0501ff..b8a3de1a4 100644
--- a/releasenotes/notes/add-server-volume-update-89740dca61596dd1.yaml
+++ b/releasenotes/notes/add-server-volume-update-89740dca61596dd1.yaml
@@ -3,3 +3,6 @@ features:
   - |
     Add ``server volume list`` command, to list the volumes attached to an
     instance.
+  - |
+    Add ``server volume update`` command, to update the volumes attached to
+    an instance.
diff --git a/requirements.txt b/requirements.txt
index ed55ce379..21e291013 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,6 +9,6 @@ openstacksdk>=0.52.0 # Apache-2.0
 osc-lib>=2.3.0 # Apache-2.0
 oslo.i18n>=3.15.3 # Apache-2.0
 python-keystoneclient>=3.22.0 # Apache-2.0
-python-novaclient>=15.1.0 # Apache-2.0
+python-novaclient>=17.0.0 # Apache-2.0
 python-cinderclient>=3.3.0 # Apache-2.0
 stevedore>=2.0.1 # Apache-2.0
diff --git a/setup.cfg b/setup.cfg
index 3fe7fa38f..ef6db5787 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -154,6 +154,7 @@ openstack.compute.v2 =
     server_image_create = openstackclient.compute.v2.server_image:CreateServerImage
 
     server_volume_list = openstackclient.compute.v2.server_volume:ListServerVolume
+    server_volume_update = openstackclient.compute.v2.server_volume:UpdateServerVolume
 
     usage_list = openstackclient.compute.v2.usage:ListUsage
     usage_show = openstackclient.compute.v2.usage:ShowUsage