diff --git a/ironic/common/utils.py b/ironic/common/utils.py
index 6500b6f685..5c2cfeb053 100644
--- a/ironic/common/utils.py
+++ b/ironic/common/utils.py
@@ -40,7 +40,6 @@ from oslo_utils import netutils
 from oslo_utils import strutils
 from oslo_utils import timeutils
 import psutil
-import pytz
 
 from ironic.common import exception
 from ironic.common.i18n import _
@@ -417,7 +416,7 @@ def unix_file_modification_datetime(file_name):
         # normalize time to be UTC without timezone
         datetime.datetime.fromtimestamp(
             # fromtimestamp will return local time by default, make it UTC
-            os.path.getmtime(file_name), tz=pytz.utc
+            os.path.getmtime(file_name), tz=datetime.timezone.utc
         )
     )
 
diff --git a/requirements.txt b/requirements.txt
index 88a3fe518a..f870709720 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,6 @@ python-cinderclient!=4.0.0,>=3.3.0 # Apache-2.0
 python-glanceclient>=2.8.0 # Apache-2.0
 keystoneauth1>=4.2.0 # Apache-2.0
 ironic-lib>=5.5.0 # Apache-2.0
-pytz>=2013.6 # MIT
 stevedore>=1.29.0 # Apache-2.0
 oslo.concurrency>=4.2.0 # Apache-2.0
 oslo.config>=6.8.0 # Apache-2.0