diff --git a/jivago/scheduling/cron_schedule.py b/jivago/scheduling/cron_schedule.py
index aa63860..9f86429 100644
--- a/jivago/scheduling/cron_schedule.py
+++ b/jivago/scheduling/cron_schedule.py
@@ -1,6 +1,5 @@
-from datetime import datetime
+from datetime import datetime, timezone
 
-import pytz
 from croniter import croniter
 
 from jivago.lang.annotations import Override
@@ -11,7 +10,7 @@ class CronSchedule(Schedule):
 
     def __init__(self, cron_string: str, start_time: datetime):
         if start_time:
-            self.iterator = croniter(cron_string, start_time=start_time.astimezone(pytz.UTC))
+            self.iterator = croniter(cron_string, start_time=start_time.astimezone(timezone.utc))
         else:
             self.iterator = croniter(cron_string)
 
diff --git a/setup.py b/setup.py
index 19d718a..00d0e66 100644
--- a/setup.py
+++ b/setup.py
@@ -61,5 +61,5 @@ def read_version_from_git() -> str:
         exclude=['contrib', 'docs', 'test', 'test.*' 'tests', 'tests.*', 'example_app', 'example_app.*', 'test_data',
                  'test_data.*', 'test_utils', 'test_utils.*', 'e2e_test', 'e2e_test.*']),
 
-    install_requires=['Jinja2', 'croniter', 'pyyaml', 'werkzeug', 'pytz'],
+    install_requires=['Jinja2', 'croniter', 'pyyaml', 'werkzeug'],
 )