diff --git a/laborious/utils/repository/opc_repository.py b/laborious/utils/repository/opc_repository.py
index a43e65b..9208559 100644
--- a/laborious/utils/repository/opc_repository.py
+++ b/laborious/utils/repository/opc_repository.py
@@ -238,9 +238,18 @@ class OpcRepository():
         data = data_type_map[data_type]['converter'](value)
         logger.custom_info(
             f'Writing {data} - {type(data)} to {node}', metadata.get('schedule_name', 'N/A'))
+        now = datetime.now()
         ua_data = DataValue(
             Variant(data, data_type_map[data_type]['opc_type']),
-            SourceTimestamp=DateTime(datetime.now())
+            SourceTimestamp=DateTime(
+                now.year,
+                now.month,
+                now.day,
+                now.hour,
+                now.minute,
+                now.second,
+                now.microsecond
+            )
         )
 
         try: