diff --git a/horizon/utils/functions.py b/horizon/utils/functions.py
index b4d5622d50..92d38f8ee2 100644
--- a/horizon/utils/functions.py
+++ b/horizon/utils/functions.py
@@ -15,6 +15,7 @@ import decimal
 import math
 import re
 
+from oslo_utils import timeutils
 from oslo_utils import units
 
 from django.conf import settings
@@ -186,5 +187,4 @@ def format_value(value):
 
 
 def one_year_from_now():
-    now = datetime.datetime.utcnow()
-    return now + datetime.timedelta(days=365)
+    return timeutils.utcnow() + datetime.timedelta(days=365)
diff --git a/openstack_dashboard/api/swift.py b/openstack_dashboard/api/swift.py
index ff67d5592c..b4a9bc6a6e 100644
--- a/openstack_dashboard/api/swift.py
+++ b/openstack_dashboard/api/swift.py
@@ -198,7 +198,9 @@ def swift_get_container(request, container_name, with_data=False):
             parameters = parse.quote(container_name.encode('utf8'))
             public_url = swift_endpoint + '/' + parameters
         ts_float = float(headers.get('x-timestamp'))
-        timestamp = datetime.utcfromtimestamp(ts_float).isoformat()
+        timestamp = datetime.fromtimestamp(
+            ts_float, tz=datetime.timezone.utc).replace(
+                tzinfo=None).isoformat()
     except Exception:
         pass
     container_info = {
@@ -411,7 +413,9 @@ def swift_get_object(request, container_name, object_name, with_data=True,
     timestamp = None
     try:
         ts_float = float(headers.get('x-timestamp'))
-        timestamp = datetime.utcfromtimestamp(ts_float).isoformat()
+        timestamp = datetime.fromtimestamp(
+            ts_float, tz=datetime.timezone.utc).replace(
+                tzinfo=None).isoformat()
     except Exception:
         pass
     obj_info = {
diff --git a/requirements.txt b/requirements.txt
index e7178e2028..a6cdf32309 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ oslo.i18n>=5.1.0 # Apache-2.0
 oslo.policy>=3.11.0 # Apache-2.0
 oslo.serialization>=4.3.0 # Apache-2.0
 oslo.upgradecheck>=1.5.0 # Apache-2.0
-oslo.utils>=4.12.0 # Apache-2.0
+oslo.utils>=7.0.0 # Apache-2.0
 osprofiler>=3.4.2 # Apache-2.0
 pyScss>=1.4.0 # MIT License
 python-cinderclient>=8.0.0 # Apache-2.0