diff --git a/packages/paperless_api/lib/src/modules/documents_api/paperless_documents_api.dart b/packages/paperless_api/lib/src/modules/documents_api/paperless_documents_api.dart
index 83f256e..5e463e9 100644
--- a/packages/paperless_api/lib/src/modules/documents_api/paperless_documents_api.dart
+++ b/packages/paperless_api/lib/src/modules/documents_api/paperless_documents_api.dart
@@ -13,6 +13,7 @@ abstract class PaperlessDocumentsApi {
     int? documentType,
     int? correspondent,
     Iterable<int> tags = const [],
+    int? asn,
   });
   Future<DocumentModel> update(DocumentModel doc);
   Future<int> findNextAsn();
diff --git a/packages/paperless_api/lib/src/modules/documents_api/paperless_documents_api_impl.dart b/packages/paperless_api/lib/src/modules/documents_api/paperless_documents_api_impl.dart
index 1b1fe42..0f6d251 100644
--- a/packages/paperless_api/lib/src/modules/documents_api/paperless_documents_api_impl.dart
+++ b/packages/paperless_api/lib/src/modules/documents_api/paperless_documents_api_impl.dart
@@ -20,6 +20,7 @@ class PaperlessDocumentsApiImpl implements PaperlessDocumentsApi {
     int? documentType,
     int? correspondent,
     Iterable<int> tags = const [],
+    int? asn,
   }) async {
     final formData = FormData();
     formData.files.add(
@@ -41,6 +42,9 @@ class PaperlessDocumentsApiImpl implements PaperlessDocumentsApi {
     if (documentType != null) {
       formData.fields.add(MapEntry('document_type', jsonEncode(documentType)));
     }
+    if (asn != null) {
+      formData.fields.add(MapEntry('archive_serial_number', jsonEncode(asn)));
+    }
     for (final tag in tags) {
       formData.fields.add(MapEntry('tags', tag.toString()));
     }