diff --git a/lower-constraints.txt b/lower-constraints.txt
index 5b755c46f5..e8841e7ec6 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -82,7 +82,7 @@ oslo.i18n==3.15.3
 oslo.log==3.36.0
 oslo.messaging==10.3.0
 oslo.middleware==3.31.0
-oslo.policy==1.38.0
+oslo.policy==2.3.0
 oslo.privsep==1.33.2
 oslo.reports==1.18.0
 oslo.rootwrap==5.8.0
diff --git a/nova/tests/unit/policy_fixture.py b/nova/tests/unit/policy_fixture.py
index a076afa93d..e27b541e37 100644
--- a/nova/tests/unit/policy_fixture.py
+++ b/nova/tests/unit/policy_fixture.py
@@ -51,6 +51,10 @@ class RealPolicyFixture(fixtures.Fixture):
         CONF.set_override('policy_file', self.policy_file, group='oslo_policy')
         nova.policy.reset()
         nova.policy.init()
+        # NOTE(gmann): Logging all the deprecation warning for every unit
+        # test will overflow the log files and leads to error. Suppress
+        # the deprecation warning for tests only.
+        nova.policy._ENFORCER.suppress_deprecation_warnings = True
         self.addCleanup(nova.policy.reset)
 
     def set_rules(self, rules, overwrite=True):
diff --git a/requirements.txt b/requirements.txt
index 4c24a45ef8..1bc368217d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -46,7 +46,7 @@ oslo.utils>=3.40.2 # Apache-2.0
 oslo.db>=4.44.0 # Apache-2.0
 oslo.rootwrap>=5.8.0 # Apache-2.0
 oslo.messaging>=10.3.0 # Apache-2.0
-oslo.policy>=1.38.0 # Apache-2.0
+oslo.policy>=2.3.0 # Apache-2.0
 oslo.privsep>=1.33.2 # Apache-2.0
 oslo.i18n>=3.15.3 # Apache-2.0
 oslo.service>=1.40.1 # Apache-2.0