diff --git a/openstackclient/compute/v2/usage.py b/openstackclient/compute/v2/usage.py
index 27f9335bb5..5d91358b97 100644
--- a/openstackclient/compute/v2/usage.py
+++ b/openstackclient/compute/v2/usage.py
@@ -153,7 +153,7 @@ class ListUsage(command.Lister):
         )
 
         date_cli_format = "%Y-%m-%d"
-        now = datetime.datetime.utcnow()
+        now = datetime.datetime.now(datetime.timezone.utc).replace(tzinfo=None)
 
         if parsed_args.start:
             start = datetime.datetime.strptime(
@@ -238,7 +238,7 @@ class ShowUsage(command.ShowOne):
         identity_client = self.app.client_manager.identity
         compute_client = self.app.client_manager.sdk_connection.compute
         date_cli_format = "%Y-%m-%d"
-        now = datetime.datetime.utcnow()
+        now = datetime.datetime.now(datetime.timezone.utc).replace(tzinfo=None)
 
         if parsed_args.start:
             start = datetime.datetime.strptime(
diff --git a/openstackclient/tests/functional/identity/v3/test_application_credential.py b/openstackclient/tests/functional/identity/v3/test_application_credential.py
index 4412592784..39c735b2bb 100644
--- a/openstackclient/tests/functional/identity/v3/test_application_credential.py
+++ b/openstackclient/tests/functional/identity/v3/test_application_credential.py
@@ -107,7 +107,8 @@ class ApplicationCredentialTests(common.IdentityTests):
         secret = data_utils.rand_name('secret')
         description = data_utils.rand_name('description')
         tomorrow = (
-            datetime.datetime.utcnow() + datetime.timedelta(days=1)
+            datetime.datetime.now(datetime.timezone.utc).replace(tzinfo=None)
+            + datetime.timedelta(days=1)
         ).strftime('%Y-%m-%dT%H:%M:%S%z')
         role1, role2 = self._create_role_assignments()
         raw_output = self.openstack(