diff --git a/AUTHORS b/AUTHORS
index ef975283..8c5bca8e 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -37,6 +37,7 @@ Grégoire Cachet <gregoire@audacy.fr>
 Hari <haridara@gmail.com>
 Idan Zalzberg <idanzalz@gmail.com>
 Ionel Maries Cristian <ionel.mc@gmail.com>
+Jaeyoung Heo <jay.jaeyoung@gmail.com>
 Jannis Leidel <jannis@leidel.info>
 Jason Baker <amnorvend@gmail.com>
 Jay States <jstates@based.ca>
diff --git a/Changelog b/Changelog
index 60a3f300..264fbe7c 100644
--- a/Changelog
+++ b/Changelog
@@ -4,6 +4,14 @@
  Change history
 ================
 
+2.3.0
+=====
+:release-date:
+:release-by:
+
+- Admin "disable_tasks" action also updates PeriodicTask's last_run_at field
+
+
 2.2.1
 =====
 :release-date: 2021-07-02 11:15 a.m. UTC+6:00
@@ -30,7 +38,7 @@
 
 2.1.0
 =====
-:release-date: 
+:release-date:
 :release-by: Asif Saif Uddin
 - Fix string representation of CrontabSchedule, so it matches UNIX CRON expression format (#318)
 - If no schedule is selected in PeriodicTask form, raise a non-field error instead of an error bounded to the `interval` field (#327)
diff --git a/django_celery_beat/admin.py b/django_celery_beat/admin.py
index aaeb76f5..650d1c6e 100644
--- a/django_celery_beat/admin.py
+++ b/django_celery_beat/admin.py
@@ -179,7 +179,7 @@ def enable_tasks(self, request, queryset):
     enable_tasks.short_description = _('Enable selected tasks')
 
     def disable_tasks(self, request, queryset):
-        rows_updated = queryset.update(enabled=False)
+        rows_updated = queryset.update(enabled=False, last_run_at=None)
         PeriodicTasks.update_changed()
         self._message_user_about_update(request, rows_updated, 'disabled')
     disable_tasks.short_description = _('Disable selected tasks')
diff --git a/t/unit/test_admin.py b/t/unit/test_admin.py
index 06aee0cd..cca2c3cc 100644
--- a/t/unit/test_admin.py
+++ b/t/unit/test_admin.py
@@ -1,7 +1,9 @@
 import pytest
+
 from django.core.exceptions import ValidationError
 from django.test import TestCase
 from itertools import combinations
+from unittest import mock
 
 from django_celery_beat.admin import PeriodicTaskAdmin
 from django_celery_beat.models import \
@@ -115,3 +117,30 @@ def test_validate_unique_not_raises(self):
         PeriodicTask(interval=IntervalSchedule()).validate_unique()
         PeriodicTask(solar=SolarSchedule()).validate_unique()
         PeriodicTask(clocked=ClockedSchedule(), one_off=True).validate_unique()
+
+
+@pytest.mark.django_db()
+class DisableTasksTest(TestCase):
+
+    @classmethod
+    def setUpTestData(cls):
+        super().setUpTestData()
+        cls.interval_schedule = IntervalSchedule.objects.create(every=10,
+                                                                period=DAYS)
+
+    @mock.patch('django_celery_beat.admin.PeriodicTaskAdmin.'
+                '_message_user_about_update')
+    def test_disable_tasks(self, mock_message_user):
+        PeriodicTask.objects.create(name='name1', task='task1', enabled=True,
+                                    interval=self.interval_schedule)
+        PeriodicTask.objects.create(name='name2', task='task2', enabled=True,
+                                    interval=self.interval_schedule)
+
+        qs = PeriodicTask.objects.all()
+
+        PeriodicTaskAdmin(PeriodicTask, None).disable_tasks(None, qs)
+
+        for periodic_task in qs:
+            self.assertFalse(periodic_task.enabled)
+            self.assertIsNone(periodic_task.last_run_at)
+        mock_message_user.assert_called_once()