diff --git a/frontend/src/api/alarms.js b/frontend/src/api/alarms.js
index a25b368ef..2c9043cf2 100644
--- a/frontend/src/api/alarms.js
+++ b/frontend/src/api/alarms.js
@@ -13,8 +13,6 @@ export default {
     return repository.delete(`${resource}/${alarmId}/`)
   },
   bulkDelete(alarmsIds) {
-    return repository.delete(`${resource}/bulk_delete/`, {
-      params: { ids: alarmsIds },
-    })
+    return repository.post(`${resource}/bulk_delete/`, { ids: alarmsIds })
   },
 }
diff --git a/modoboa/admin/api/v2/serializers.py b/modoboa/admin/api/v2/serializers.py
index b955685e0..f41e729d8 100644
--- a/modoboa/admin/api/v2/serializers.py
+++ b/modoboa/admin/api/v2/serializers.py
@@ -741,6 +741,11 @@ class AlarmSerializer(serializers.ModelSerializer):
         model = models.Alarm
 
 
+class AlarmBulkDeleteSerializer(serializers.Serializer):
+
+    ids = serializers.ListField(child=serializers.IntegerField())
+
+
 class AlarmSwitchStatusSerializer(serializers.Serializer):
     """Serializer to switch the status of an Alarm."""
 
diff --git a/modoboa/admin/api/v2/tests.py b/modoboa/admin/api/v2/tests.py
index f495c0ebb..f5d318d0b 100644
--- a/modoboa/admin/api/v2/tests.py
+++ b/modoboa/admin/api/v2/tests.py
@@ -806,9 +806,10 @@ class AlarmViewSetTestCase(ModoAPITestCase):
 
     def test_bulk_delete(self):
         url = reverse("v2:alarm-bulk-delete")
-        resp = self.client.delete(url)
+        resp = self.client.post(url)
         self.assertEqual(resp.status_code, 400)
-        resp = self.client.delete(f"{url}?ids[]=toto")
+        data = {"ids": ["toto"]}
+        resp = self.client.post(url, data, format="json")
         self.assertEqual(resp.status_code, 400)
         alarm1 = factories.AlarmFactory(
             domain__name="test.com", mailbox=None, title="Test alarm"
@@ -816,7 +817,8 @@ class AlarmViewSetTestCase(ModoAPITestCase):
         alarm2 = factories.AlarmFactory(
             domain__name="test.com", mailbox=None, title="Test alarm"
         )
-        resp = self.client.delete(f"{url}?ids[]={alarm1.pk}&ids[]={alarm2.pk}")
+        data = {"ids": [alarm1.pk, alarm2.pk]}
+        resp = self.client.post(url, data, format="json")
         self.assertEqual(resp.status_code, 204)
         with self.assertRaises(models.Alarm.DoesNotExist):
             alarm1.refresh_from_db()
diff --git a/modoboa/admin/api/v2/viewsets.py b/modoboa/admin/api/v2/viewsets.py
index 702440aa9..e75d137c4 100644
--- a/modoboa/admin/api/v2/viewsets.py
+++ b/modoboa/admin/api/v2/viewsets.py
@@ -387,11 +387,18 @@ class AlarmViewSet(
             .order_by("-created")
         )
 
+    def get_serializer_class(self, *args, **kwargs):
+        if self.action == "bulk_delete":
+            return serializers.AlarmBulkDeleteSerializer
+        elif self.action == "switch":
+            return serializers.AlarmSwitchStatusSerializer
+        return serializers.AlarmSerializer
+
     @action(methods=["patch"], detail=True)
     def switch(self, request, **kwargs):
         """Custom update method that switch status of an alarm."""
         alarm = self.get_object()
-        serializer = serializers.AlarmSwitchStatusSerializer(data=request.data)
+        serializer = self.get_serializer(data=request.data)
         serializer.is_valid(raise_exception=True)
         if serializer.data["status"] == constants.ALARM_CLOSED:
             alarm.close()
@@ -399,15 +406,10 @@ class AlarmViewSet(
             alarm.reopen()
         return response.Response(status=status.HTTP_204_NO_CONTENT)
 
-    @action(methods=["delete"], detail=False)
+    @action(methods=["post"], detail=False)
     def bulk_delete(self, request, **kwargs):
         """Delete multiple alarms at the same time."""
-        ids = request.query_params.getlist("ids[]")
-        if not ids:
-            return response.Response(_("No alarm ID provided"), status=400)
-        try:
-            ids = [int(alarm_id) for alarm_id in ids]
-        except ValueError:
-            return response.Response(_("Received invalid alarm id(s)"), status=400)
-        models.Alarm.objects.filter(pk__in=ids).delete()
+        serializer = self.get_serializer(data=request.data)
+        serializer.is_valid(raise_exception=True)
+        models.Alarm.objects.filter(pk__in=serializer.validated_data["ids"]).delete()
         return response.Response(status=204)