diff --git a/apps/tag/tools.py b/apps/tag/tools.py
index b3ecec4..4c084fc 100644
--- a/apps/tag/tools.py
+++ b/apps/tag/tools.py
@@ -6,15 +6,20 @@ def tag_code_serial_scanning(serial: str = None) -> typing.AnyStr:
     serial code is 8 number serial,
     set 4 first numbers to 0
     """
-    if len(str(serial)) == 4:
+    if len(str(serial)) == 1:
+        scanned_serial = "000000" + str(serial)
+    if len(str(serial)) == 2:
+        scanned_serial = "00000" + str(serial)
+    if len(str(serial)) == 3:
         scanned_serial = "0000" + str(serial)
-    if len(str(serial)) == 5:
+    if len(str(serial)) == 4:
         scanned_serial = "000" + str(serial)
-    if len(str(serial)) == 6:
+    if len(str(serial)) == 5:
         scanned_serial = "00" + str(serial)
-    if len(str(serial)) == 7:
+    if len(str(serial)) == 6:
         scanned_serial = "0" + str(serial)
+    if len(str(serial)) == 7:
+        scanned_serial = str(serial)
     else:
         pass
     return scanned_serial
-