diff --git a/neutron/conf/plugins/ml2/config.py b/neutron/conf/plugins/ml2/config.py
index f3aa74c5bdd..cd56ee6794a 100644
--- a/neutron/conf/plugins/ml2/config.py
+++ b/neutron/conf/plugins/ml2/config.py
@@ -15,7 +15,6 @@
 
 from neutron_lib import constants
 from oslo_config import cfg
-from oslo_config import types
 
 from neutron._i18n import _
 from neutron.common import _constants as common_const
@@ -68,13 +67,14 @@ ml2_opts = [
                       "values for external_network_type config option depend "
                       "on the network type values configured in type_drivers "
                       "config option.")),
-    cfg.Opt('overlay_ip_version',
-            default=constants.IP_VERSION_4,
-            type=types.Integer(choices=[
-                (constants.IP_VERSION_4, 'IPv4'),
-                (constants.IP_VERSION_6, 'IPv6')
-            ]),
-            help=_("IP version of all overlay (tunnel) network endpoints.")),
+    cfg.IntOpt('overlay_ip_version',
+               default=constants.IP_VERSION_4,
+               choices=[
+                   (constants.IP_VERSION_4, 'IPv4'),
+                   (constants.IP_VERSION_6, 'IPv6')
+               ],
+               help=_("IP version of all overlay (tunnel) network "
+                      "endpoints.")),
     cfg.StrOpt('tunnelled_network_rp_name',
                default=common_const.RP_TUNNELLED,
                help=_("Resource provider name for the host with tunnelled "
diff --git a/requirements.txt b/requirements.txt
index 101d4f3d578..8ca4deab8f0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ alembic>=1.6.5 # MIT
 stevedore>=2.0.1 # Apache-2.0
 oslo.cache>=1.26.0 # Apache-2.0
 oslo.concurrency>=3.26.0 # Apache-2.0
-oslo.config>=9.0.0 # Apache-2.0
+oslo.config>=9.4.0 # Apache-2.0
 oslo.context>=2.22.0 # Apache-2.0
 oslo.db>=4.44.0 # Apache-2.0
 oslo.i18n>=3.20.0 # Apache-2.0