diff --git a/neutron/db/allowedaddresspairs_db.py b/neutron/db/allowedaddresspairs_db.py
index 0cdcf20fceb..ddee97ff095 100644
--- a/neutron/db/allowedaddresspairs_db.py
+++ b/neutron/db/allowedaddresspairs_db.py
@@ -19,6 +19,7 @@ from neutron_lib.api.definitions import port as port_def
 from neutron_lib.api import validators
 from neutron_lib.callbacks import events
 from neutron_lib.callbacks import registry
+from neutron_lib.callbacks import resources
 from neutron_lib.db import api as db_api
 from neutron_lib.db import resource_extend
 from neutron_lib.db import utils as db_utils
@@ -44,10 +45,8 @@ class AllowedAddressPairsMixin:
             'network_id': port['network_id'],
             'allowed_address_pairs': allowed_address_pairs,
         }
-        # TODO(slaweq): use constant from neutron_lib.callbacks.resources once
-        # it will be available and released
         registry.publish(
-            'allowed_address_pair', events.BEFORE_CREATE, self,
+            resources.ALLOWED_ADDRESS_PAIR, events.BEFORE_CREATE, self,
             payload=events.DBEventPayload(
                 context,
                 resource_id=port['id'],
diff --git a/neutron/plugins/ml2/drivers/ovn/mech_driver/mech_driver.py b/neutron/plugins/ml2/drivers/ovn/mech_driver/mech_driver.py
index 38fd65fc3d2..0f3ff307327 100644
--- a/neutron/plugins/ml2/drivers/ovn/mech_driver/mech_driver.py
+++ b/neutron/plugins/ml2/drivers/ovn/mech_driver/mech_driver.py
@@ -305,10 +305,8 @@ class OVNMechanismDriver(api.MechanismDriver):
         registry.subscribe(self.delete_segment_provnet_port,
                            resources.SEGMENT,
                            events.AFTER_DELETE)
-        # TODO(slaweq): use constant from neutron_lib.callbacks.resources once
-        # it will be available and released
         registry.subscribe(self._validate_allowed_address_pairs,
-                           'allowed_address_pair',
+                           resources.ALLOWED_ADDRESS_PAIR,
                            events.BEFORE_CREATE)
 
         # Handle security group/rule or address group notifications
diff --git a/neutron/tests/unit/db/test_l3_db.py b/neutron/tests/unit/db/test_l3_db.py
index de57922d6a3..011ed78b8ed 100644
--- a/neutron/tests/unit/db/test_l3_db.py
+++ b/neutron/tests/unit/db/test_l3_db.py
@@ -1081,10 +1081,7 @@ class L3TestCase(test_db_base_plugin_v2.NeutronDbPluginV2TestCase):
                           self.mixin, payload=mock.ANY),
                 mock.call(resources.PORT, events.BEFORE_CREATE,
                           mock.ANY, payload=mock.ANY),
-                # TODO(slaweq): use constant from
-                # neutron_lib.callbacks.resources once it will be available
-                # and released
-                mock.call('allowed_address_pair', events.BEFORE_CREATE,
+                mock.call(resources.ALLOWED_ADDRESS_PAIR, events.BEFORE_CREATE,
                           mock.ANY, payload=mock.ANY),
                 mock.call(resources.PORT, events.PRECOMMIT_CREATE,
                           mock.ANY, payload=mock.ANY),
diff --git a/requirements.txt b/requirements.txt
index 441e9baefae..3b17eff9f13 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ requests>=2.32.3 # Apache-2.0
 Jinja2>=2.10 # BSD License (3 clause)
 keystonemiddleware>=5.1.0 # Apache-2.0
 netaddr>=0.7.18 # BSD
-neutron-lib>=3.20.0 # Apache-2.0
+neutron-lib>=3.21.0 # Apache-2.0
 python-neutronclient>=7.8.0 # Apache-2.0
 tenacity>=6.0.0 # Apache-2.0
 SQLAlchemy>=1.4.23 # MIT