diff --git a/apps/wpm/services.py b/apps/wpm/services.py
index 1f85a113..94336a7a 100644
--- a/apps/wpm/services.py
+++ b/apps/wpm/services.py
@@ -27,11 +27,11 @@ def generate_new_batch(old_batch: str, mlog: Mlog):
     if mlog.mtype == Mlog.MTYPE_OUT:
         supplier_number = supplier.number if supplier else ''
         if supplier_number:
-            new_batch = f'{new_batch}-{supplier_number}'
+            new_batch = f'{new_batch}>{supplier_number}'
     elif process.batch_append_equip:
         number = mlog.equipment.number if mlog.equipment else ''
         if number:
-            new_batch = f'{new_batch}-{number}'
+            new_batch = f'{new_batch}>{number}'
     return new_batch
 
 def find_material_can_change(material: Material, mgroup_to: Mgroup):