diff --git a/blazar/config.py b/blazar/config.py
index 621dc892..67a4f504 100644
--- a/blazar/config.py
+++ b/blazar/config.py
@@ -16,7 +16,6 @@
 
 from oslo_config import cfg
 from oslo_log import log as logging
-from oslo_policy import opts
 
 
 cli_opts = [
@@ -91,18 +90,3 @@ CONF.register_opts(os_opts)
 CONF.register_opts(api_opts)
 CONF.register_opts(lease_opts)
 logging.register_options(cfg.CONF)
-
-
-def set_lib_defaults():
-    """Update default value for configuration options from other namespace.
-
-    Example, oslo lib config options. This is needed for
-    config generator tool to pick these default value changes.
-    https://docs.openstack.org/oslo.config/latest/cli/
-    generator.html#modifying-defaults-from-other-namespaces
-    """
-
-    # TODO(gmann): Remove setting the default value of config policy_file
-    # once oslo_policy change the default value to 'policy.yaml'.
-    # https://github.com/openstack/oslo.policy/blob/a626ad12fe5a3abd49d70e3e5b95589d279ab578/oslo_policy/opts.py#L49
-    opts.set_defaults(CONF, 'policy.yaml')
diff --git a/blazar/policy.py b/blazar/policy.py
index a4e2f0c5..7d37f3fb 100644
--- a/blazar/policy.py
+++ b/blazar/policy.py
@@ -19,7 +19,6 @@ import functools
 
 from oslo_config import cfg
 from oslo_log import log as logging
-from oslo_policy import opts
 from oslo_policy import policy
 
 from blazar import context
@@ -30,13 +29,6 @@ CONF = cfg.CONF
 LOG = logging.getLogger(__name__)
 
 
-# TODO(gmann): Remove setting the default value of config policy_file
-# once oslo_policy change the default value to 'policy.yaml'.
-# https://github.com/openstack/oslo.policy/blob/a626ad12fe5a3abd49d70e3e5b95589d279ab578/oslo_policy/opts.py#L49
-DEFAULT_POLICY_FILE = 'policy.yaml'
-opts.set_defaults(CONF, DEFAULT_POLICY_FILE)
-
-
 _ENFORCER = None
 
 
diff --git a/requirements.txt b/requirements.txt
index ab3de649..d1321be6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ oslo.i18n>=3.15.3 # Apache-2.0
 oslo.log>=3.36.0 # Apache-2.0
 oslo.messaging>=5.29.0 # Apache-2.0
 oslo.middleware>=3.31.0 # Apache-2.0
-oslo.policy>=3.6.0 # Apache-2.0
+oslo.policy>=4.5.0 # Apache-2.0
 oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
 oslo.service>=1.34.0 # Apache-2.0
 oslo.upgradecheck>=1.3.0 # Apache-2.0
diff --git a/setup.cfg b/setup.cfg
index 98bda8ba..81ed03ea 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -54,8 +54,6 @@ blazar.api.v2.controllers.extensions =
 
 oslo.config.opts =
     blazar = blazar.opts:list_opts
-oslo.config.opts.defaults =
-    blazar = blazar.config:set_lib_defaults
 
 oslo.policy.policies =
     blazar = blazar.policies:list_rules