diff --git a/src/documents/index.py b/src/documents/index.py
index 7ba50a324..7add84bb7 100644
--- a/src/documents/index.py
+++ b/src/documents/index.py
@@ -34,7 +34,7 @@ def get_schema():
         id=NUMERIC(stored=True, unique=True),
         title=TEXT(sortable=True),
         content=TEXT(),
-        asn=NUMERIC(sortable=True),
+        asn=NUMERIC(sortable=True, signed=False),
         correspondent=TEXT(sortable=True),
         correspondent_id=NUMERIC(),
         has_correspondent=BOOLEAN(),
diff --git a/src/documents/migrations/1029_alter_document_archive_serial_number.py b/src/documents/migrations/1029_alter_document_archive_serial_number.py
index fe591c391..d7e4b662d 100644
--- a/src/documents/migrations/1029_alter_document_archive_serial_number.py
+++ b/src/documents/migrations/1029_alter_document_archive_serial_number.py
@@ -1,4 +1,4 @@
-# Generated by Django 4.1.4 on 2023-01-24 05:09
+# Generated by Django 4.1.4 on 2023-01-24 17:56
 
 import django.core.validators
 from django.db import migrations, models
@@ -21,7 +21,7 @@ class Migration(migrations.Migration):
                 null=True,
                 unique=True,
                 validators=[
-                    django.core.validators.MaxValueValidator(2147483647),
+                    django.core.validators.MaxValueValidator(4294967295),
                     django.core.validators.MinValueValidator(0),
                 ],
                 verbose_name="archive serial number",
diff --git a/src/documents/models.py b/src/documents/models.py
index e9da713aa..84e96a79a 100644
--- a/src/documents/models.py
+++ b/src/documents/models.py
@@ -236,7 +236,7 @@ class Document(models.Model):
         unique=True,
         db_index=True,
         validators=[
-            MaxValueValidator(2147483647),
+            MaxValueValidator(0xFF_FF_FF_FF),
             MinValueValidator(0),
         ],
         help_text=_(