diff --git a/ereuse_devicehub/resources/device/models.py b/ereuse_devicehub/resources/device/models.py
index 3eb445d9..682327bb 100644
--- a/ereuse_devicehub/resources/device/models.py
+++ b/ereuse_devicehub/resources/device/models.py
@@ -28,7 +28,7 @@ from teal.resource import url_for_resource
 from ereuse_devicehub.db import db
 from ereuse_devicehub.resources.enums import BatteryTechnology, CameraFacing, ComputerChassis, \
     DataStorageInterface, DisplayTech, PrinterTechnology, RamFormat, RamInterface, Severity, TransferState
-from ereuse_devicehub.resources.models import STR_SM_SIZE, Thing, update_timestamp
+from ereuse_devicehub.resources.models import STR_SM_SIZE, Thing, listener_reset_field_updated_in_actual_time
 from ereuse_devicehub.resources.user.models import User
 
 
@@ -883,57 +883,4 @@ class Manufacturer(db.Model):
             )
 
 
-
-update_timestamp(Computer)
-update_timestamp(Desktop)
-update_timestamp(Laptop)
-update_timestamp(Server)
-update_timestamp(Monitor)
-update_timestamp(ComputerMonitor)
-update_timestamp(TelevisionSet)
-update_timestamp(Projector)
-update_timestamp(Mobile)
-update_timestamp(Smartphone)
-update_timestamp(Tablet)
-update_timestamp(Cellphone)
-update_timestamp(Component)
-update_timestamp(GraphicCard)
-update_timestamp(DataStorage)
-update_timestamp(HardDrive)
-update_timestamp(SolidStateDrive)
-update_timestamp(Motherboard)
-update_timestamp(NetworkAdapter)
-update_timestamp(Processor)
-update_timestamp(RamModule)
-update_timestamp(SoundCard)
-update_timestamp(Display)
-update_timestamp(Battery)
-update_timestamp(Camera)
-update_timestamp(ComputerAccessory)
-update_timestamp(SAI)
-update_timestamp(Keyboard)
-update_timestamp(Mouse)
-update_timestamp(MemoryCardReader)
-update_timestamp(Networking)
-update_timestamp(Router)
-update_timestamp(Switch)
-update_timestamp(Hub)
-update_timestamp(WirelessAccessPoint)
-update_timestamp(Printer)
-update_timestamp(LabelPrinter)
-update_timestamp(Sound)
-update_timestamp(Microphone)
-update_timestamp(Video)
-update_timestamp(VideoScaler)
-update_timestamp(Videoconference)
-update_timestamp(Cooking)
-update_timestamp(Mixer)
-update_timestamp(DIYAndGardening)
-update_timestamp(Drill)
-update_timestamp(PackOfScrewdrivers)
-update_timestamp(Home)
-update_timestamp(Dehumidifier)
-update_timestamp(Stairs)
-update_timestamp(Recreation)
-update_timestamp(Bike)
-update_timestamp(Racket)
+listener_reset_field_updated_in_actual_time(Device)
diff --git a/ereuse_devicehub/resources/models.py b/ereuse_devicehub/resources/models.py
index d6fafc78..e079269f 100644
--- a/ereuse_devicehub/resources/models.py
+++ b/ereuse_devicehub/resources/models.py
@@ -37,10 +37,10 @@ class Thing(db.Model):
         super().__init__(**kwargs)
 
 
-def on_update_time(mapper, connection, thing_obj):
+def update_object_timestamp(mapper, connection, thing_obj):
     """ This function update the stamptime of field updated """
-    thing_obj.updated = datetime.now()
+    thing_obj.updated = datetime.now(timezone.utc)
 
-def update_timestamp(thing_obj):
+def listener_reset_field_updated_in_actual_time(thing_obj):
     """ This function launch a event than listen like a signal when some object is saved """
-    event.listen(thing_obj, 'before_update', on_update_time)
+    event.listen(thing_obj, 'before_update', update_object_timestamp, propagate=True)