diff --git a/README.md b/README.md
index f55bcd5..2436347 100644
--- a/README.md
+++ b/README.md
@@ -148,6 +148,8 @@ In a non-production environment you should manually run `schedule-monitor:sync`.
 
 **Note:** Running the sync command will remove any other cron monitors that you've defined other than the application schedule.
 
+If you would like to use non-destructive syncs to Oh Dear so that you can monitor other cron tasks outside of Laravel, you can use the `--keep-old` flag. This will only push new tasks to Oh Dear, rather than a full sync. Note that this will not remove any tasks from Oh Dear that are no longer in your schedule.
+
 ## Usage
 
 To monitor your schedule you should first run `schedule-monitor:sync`. This command will take a look at your schedule and create an entry for each task in the `monitored_scheduled_tasks` table.
diff --git a/composer.json b/composer.json
index d3c9f57..5fcb2df 100644
--- a/composer.json
+++ b/composer.json
@@ -29,6 +29,7 @@
         "orchestra/testbench": "^7.0|^8.0",
         "pestphp/pest": "^1.20",
         "pestphp/pest-plugin-laravel": "^1.2",
+        "spatie/pest-plugin-snapshots": "^1.1",
         "spatie/phpunit-snapshot-assertions": "^4.2",
         "spatie/test-time": "^1.2"
     },
diff --git a/src/Commands/SyncCommand.php b/src/Commands/SyncCommand.php
index 88cb880..6511f4b 100644
--- a/src/Commands/SyncCommand.php
+++ b/src/Commands/SyncCommand.php
@@ -15,7 +15,7 @@ class SyncCommand extends Command
 {
     use UsesScheduleMonitoringModels;
 
-    public $signature = 'schedule-monitor:sync';
+    public $signature = 'schedule-monitor:sync {--keep-old}';
 
     public $description = 'Sync the schedule of the app with the schedule monitor';
 
@@ -27,8 +27,8 @@ public function handle()
         ]));
 
         $this
-            ->syncScheduledTasksWithDatabase()
-            ->syncMonitoredScheduledTaskWithOhDear();
+            ->storeScheduledTasksInDatabase()
+            ->storeMonitoredScheduledTasksInOhDear();
 
         $monitoredScheduledTasksCount = $this->getMonitoredScheduleTaskModel()->count();
 
@@ -37,7 +37,7 @@ public function handle()
         ]));
     }
 
-    protected function syncScheduledTasksWithDatabase(): self
+    protected function storeScheduledTasksInDatabase(): self
     {
         render(view('schedule-monitor::alert', [
             'message' => 'Start syncing schedule with database...',
@@ -57,14 +57,16 @@ protected function syncScheduledTasksWithDatabase(): self
                 );
             });
 
-        $this->getMonitoredScheduleTaskModel()->query()
-            ->whereNotIn('id', $monitoredScheduledTasks->pluck('id'))
-            ->delete();
+        if (! $this->option('keep-old')) {
+            $this->getMonitoredScheduleTaskModel()->query()
+                ->whereNotIn('id', $monitoredScheduledTasks->pluck('id'))
+                ->delete();
+        }
 
         return $this;
     }
 
-    protected function syncMonitoredScheduledTaskWithOhDear(): self
+    protected function storeMonitoredScheduledTasksInOhDear(): self
     {
         if (! class_exists(OhDear::class)) {
             return $this;
@@ -93,6 +95,32 @@ protected function syncMonitoredScheduledTaskWithOhDear(): self
             'message' => 'Start syncing schedule with Oh Dear...',
         ]));
 
+        $cronChecks = $this->option('keep-old')
+            ? $this->pushMonitoredScheduledTaskToOhDear($siteId)
+            : $this->syncMonitoredScheduledTaskWithOhDear($siteId);
+
+        render(view('schedule-monitor::alert', [
+            'message' => 'Successfully synced schedule with Oh Dear!',
+            'class' => 'text-green',
+        ]));
+
+        collect($cronChecks)
+            ->each(
+                function (CronCheck $cronCheck) {
+                    if (! $monitoredScheduledTask = $this->getMonitoredScheduleTaskModel()->findForCronCheck($cronCheck)) {
+                        return;
+                    }
+
+                    $monitoredScheduledTask->update(['ping_url' => $cronCheck->pingUrl]);
+                    $monitoredScheduledTask->markAsRegisteredOnOhDear();
+                }
+            );
+
+        return $this;
+    }
+
+    protected function syncMonitoredScheduledTaskWithOhDear(int $siteId): array
+    {
         $monitoredScheduledTasks = $this->getMonitoredScheduleTaskModel()->get();
 
         $cronChecks = $monitoredScheduledTasks
@@ -110,23 +138,27 @@ protected function syncMonitoredScheduledTaskWithOhDear(): self
 
         $cronChecks = app(OhDear::class)->site($siteId)->syncCronChecks($cronChecks);
 
-        render(view('schedule-monitor::alert', [
-            'message' => 'Successfully synced schedule with Oh Dear!',
-            'class' => 'text-green',
-        ]));
-
-        collect($cronChecks)
-            ->each(
-                function (CronCheck $cronCheck) {
-                    if (! $monitoredScheduledTask = $this->getMonitoredScheduleTaskModel()->findForCronCheck($cronCheck)) {
-                        return;
-                    }
+        return $cronChecks;
+    }
 
-                    $monitoredScheduledTask->update(['ping_url' => $cronCheck->pingUrl]);
-                    $monitoredScheduledTask->markAsRegisteredOnOhDear();
-                }
+    protected function pushMonitoredScheduledTaskToOhDear(int $siteId): array
+    {
+        $tasksToRegister = $this->getMonitoredScheduleTaskModel()
+            ->whereNull('registered_on_oh_dear_at')
+            ->get();
+
+        $cronChecks = [];
+        foreach ($tasksToRegister as $taskToRegister) {
+            $cronChecks[] = app(OhDear::class)->createCronCheck(
+                siteId: $siteId,
+                name: $taskToRegister->name,
+                cronExpression: $taskToRegister->cron_expression,
+                graceTimeInMinutes: $taskToRegister->grace_time_in_minutes,
+                description: '',
+                serverTimezone: $taskToRegister->timezone,
             );
+        }
 
-        return $this;
+        return $cronChecks;
     }
 }
diff --git a/tests/Commands/SyncCommandTest.php b/tests/Commands/SyncCommandTest.php
index b6d3b2b..88a4b57 100644
--- a/tests/Commands/SyncCommandTest.php
+++ b/tests/Commands/SyncCommandTest.php
@@ -6,6 +6,7 @@
 use Spatie\ScheduleMonitor\Tests\TestClasses\TestJob;
 use Spatie\ScheduleMonitor\Tests\TestClasses\TestKernel;
 use Spatie\TestTime\TestTime;
+use function Spatie\Snapshots\{assertMatchesSnapshot};
 
 beforeEach(function () {
     TestTime::freeze('Y-m-d H:i:s', '2020-01-01 00:00:00');
@@ -76,7 +77,73 @@
         'timezone' => 'Asia/Kolkata',
     ]);
 
-    $this->assertMatchesSnapshot($this->ohDear->getSyncedCronCheckAttributes());
+    assertMatchesSnapshot($this->ohDear->getSyncedCronCheckAttributes());
+});
+
+it('can use the keep old option to non destructively update the schedule with db and oh dear', function () {
+    MonitoredScheduledTask::create([
+        'name' => 'dummy-1',
+        'type' => 'command',
+        'cron_expression' => '* * * * *',
+        'ping_url' => 'https://ping.ohdear.app/test-ping-url-dummy-1',
+        'registered_on_oh_dear_at' => now()->format('Y-m-d H:i:s'),
+        'grace_time_in_minutes' => 5,
+        'last_pinged_at' => null,
+        'last_started_at' => null,
+        'last_finished_at' => null,
+        'timezone' => 'UTC',
+    ]);
+
+    TestKernel::registerScheduledTasks(function (Schedule $schedule) {
+        $schedule->command('dummy-2')->hourly();
+        $schedule->command('dummy-3')->daily();
+    });
+   
+    $this->artisan(SyncCommand::class, ['--keep-old' => true]);
+
+    $monitoredScheduledTasks = MonitoredScheduledTask::get();
+    expect($monitoredScheduledTasks)->toHaveCount(3);
+
+    $this->assertDatabaseHas('monitored_scheduled_tasks', [
+        'name' => 'dummy-1',
+        'type' => 'command',
+        'cron_expression' => '* * * * *',
+        'ping_url' => 'https://ping.ohdear.app/test-ping-url-dummy-1',
+        'registered_on_oh_dear_at' => now()->format('Y-m-d H:i:s'),
+        'grace_time_in_minutes' => 5,
+        'last_pinged_at' => null,
+        'last_started_at' => null,
+        'last_finished_at' => null,
+        'timezone' => 'UTC',
+    ]);
+
+    $this->assertDatabaseHas('monitored_scheduled_tasks', [
+        'name' => 'dummy-2',
+        'type' => 'command',
+        'cron_expression' => '0 * * * *',
+        'ping_url' => 'https://ping.ohdear.app/test-ping-url-dummy-2',
+        'registered_on_oh_dear_at' => now()->format('Y-m-d H:i:s'),
+        'grace_time_in_minutes' => 5,
+        'last_pinged_at' => null,
+        'last_started_at' => null,
+        'last_finished_at' => null,
+        'timezone' => 'UTC',
+    ]);
+
+    $this->assertDatabaseHas('monitored_scheduled_tasks', [
+        'name' => 'dummy-3',
+        'type' => 'command',
+        'cron_expression' => '0 0 * * *',
+        'ping_url' => 'https://ping.ohdear.app/test-ping-url-dummy-3',
+        'registered_on_oh_dear_at' => now()->format('Y-m-d H:i:s'),
+        'grace_time_in_minutes' => 5,
+        'last_pinged_at' => null,
+        'last_started_at' => null,
+        'last_finished_at' => null,
+        'timezone' => 'UTC',
+    ]);
+
+    assertMatchesSnapshot($this->ohDear->getSyncedCronCheckAttributes());
 });
 
 it('will not monitor commands without a name', function () {
diff --git a/tests/TestClasses/FakeOhDear.php b/tests/TestClasses/FakeOhDear.php
index fc87306..f8fcdb1 100644
--- a/tests/TestClasses/FakeOhDear.php
+++ b/tests/TestClasses/FakeOhDear.php
@@ -28,6 +28,30 @@ public function getSyncedCronCheckAttributes(): array
     {
         return $this->syncedCronCheckAttributes;
     }
+
+    public function createCronCheck(
+        int $siteId,
+        string $name,
+        string $cronExpression,
+        int $graceTimeInMinutes,
+        $description,
+        string $serverTimezone
+    ): CronCheck {
+        $attributes = [
+            'name' => $name,
+            'type' => 'cron',
+            'cron_expression' => $cronExpression,
+            'grace_time_in_minutes' => $graceTimeInMinutes,
+            'description' => $description ?? '',
+            'server_timezone' => $serverTimezone,
+        ];
+
+        $attributes['ping_url'] = 'https://ping.ohdear.app/test-ping-url-' . urlencode($attributes['name']);
+
+        $this->syncedCronCheckAttributes[] = $attributes;
+
+        return new CronCheck($attributes, $this);
+    }
 }
 
 class FakeSite extends Site
diff --git a/tests/Commands/__snapshots__/SyncCommandTest__it_can_sync_the_schedule_with_the_db_and_oh_dear__1.yml b/tests/__snapshots__/SyncCommandTest__it_can_sync_the_schedule_with_the_db_and_oh_dear__1.yml
similarity index 100%
rename from tests/Commands/__snapshots__/SyncCommandTest__it_can_sync_the_schedule_with_the_db_and_oh_dear__1.yml
rename to tests/__snapshots__/SyncCommandTest__it_can_sync_the_schedule_with_the_db_and_oh_dear__1.yml
diff --git a/tests/__snapshots__/SyncCommandTest__it_can_use_the_keep_old_option_to_non_destructively_update_the_schedule_with_db_and_oh_dear__1.yml b/tests/__snapshots__/SyncCommandTest__it_can_use_the_keep_old_option_to_non_destructively_update_the_schedule_with_db_and_oh_dear__1.yml
new file mode 100644
index 0000000..35180ba
--- /dev/null
+++ b/tests/__snapshots__/SyncCommandTest__it_can_use_the_keep_old_option_to_non_destructively_update_the_schedule_with_db_and_oh_dear__1.yml
@@ -0,0 +1,16 @@
+-
+    name: dummy-2
+    type: cron
+    cron_expression: '0 * * * *'
+    grace_time_in_minutes: 5
+    description: ''
+    server_timezone: UTC
+    ping_url: 'https://ping.ohdear.app/test-ping-url-dummy-2'
+-
+    name: dummy-3
+    type: cron
+    cron_expression: '0 0 * * *'
+    grace_time_in_minutes: 5
+    description: ''
+    server_timezone: UTC
+    ping_url: 'https://ping.ohdear.app/test-ping-url-dummy-3'