diff --git a/InvenTree/InvenTree/api_version.py b/InvenTree/InvenTree/api_version.py
index cbb567a9e9..b3df418090 100644
--- a/InvenTree/InvenTree/api_version.py
+++ b/InvenTree/InvenTree/api_version.py
@@ -2,11 +2,14 @@
 
 
 # InvenTree API version
-INVENTREE_API_VERSION = 128
+INVENTREE_API_VERSION = 129
 
 """
 Increment this API version number whenever there is a significant change to the API that any clients need to know about
 
+v129 -> 2023-07-06 : https://github.com/inventree/InvenTree/pull/5189
+    - Changes 'serial_lte' and 'serial_gte' stock filters to point to 'serial_int' field
+
 v128 -> 2023-07-06 : https://github.com/inventree/InvenTree/pull/5186
     - Adds 'available' filter for BuildLine API endpoint
 
diff --git a/InvenTree/stock/api.py b/InvenTree/stock/api.py
index 3011e2e9df..8dcd3c1763 100644
--- a/InvenTree/stock/api.py
+++ b/InvenTree/stock/api.py
@@ -464,8 +464,9 @@ class StockFilter(rest_filters.FilterSet):
     is_building = rest_filters.BooleanFilter(label="In production")
 
     # Serial number filtering
-    serial_gte = rest_filters.NumberFilter(label='Serial number GTE', field_name='serial', lookup_expr='gte')
-    serial_lte = rest_filters.NumberFilter(label='Serial number LTE', field_name='serial', lookup_expr='lte')
+    serial_gte = rest_filters.NumberFilter(label='Serial number GTE', field_name='serial_int', lookup_expr='gte')
+    serial_lte = rest_filters.NumberFilter(label='Serial number LTE', field_name='serial_int', lookup_expr='lte')
+
     serial = rest_filters.CharFilter(label='Serial number', field_name='serial', lookup_expr='exact')
 
     serialized = rest_filters.BooleanFilter(label='Has serial number', method='filter_serialized')