diff --git a/routes/sipro.py b/routes/sipro.py
index aa90555..93b0757 100644
--- a/routes/sipro.py
+++ b/routes/sipro.py
@@ -26,7 +26,7 @@ def assembly_info():
     expand_param = params.get('expand')
     order_ids = params.get('orderIds')
     expand_list = expand_param if expand_param else []
-    datetime_format = 'YYYY-MM-DD, HH24:MI'
+    datetime_format = 'YYYY.MM.DD, HH24:MI'
     entity_list = [
         database.Assembly.id.label('id'),
         database.Assembly.order_id.label('order_id'),