diff --git a/InvenTree/part/migrations/0100_alter_bomitem_reference.py b/InvenTree/part/migrations/0100_alter_bomitem_reference.py
new file mode 100644
index 0000000000..8e403125e0
--- /dev/null
+++ b/InvenTree/part/migrations/0100_alter_bomitem_reference.py
@@ -0,0 +1,18 @@
+# Generated by Django 3.2.18 on 2023-03-08 21:00
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0099_alter_bomitem_inherited'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='bomitem',
+            name='reference',
+            field=models.CharField(blank=True, help_text='BOM item reference', max_length=5000, verbose_name='Reference'),
+        ),
+    ]
diff --git a/InvenTree/part/models.py b/InvenTree/part/models.py
index d3b0408eaf..4e3e56e046 100644
--- a/InvenTree/part/models.py
+++ b/InvenTree/part/models.py
@@ -3583,7 +3583,7 @@ class BomItem(DataImportMixin, models.Model):
                                help_text=_('Estimated build wastage quantity (absolute or percentage)')
                                )
 
-    reference = models.CharField(max_length=500, blank=True, verbose_name=_('Reference'), help_text=_('BOM item reference'))
+    reference = models.CharField(max_length=5000, blank=True, verbose_name=_('Reference'), help_text=_('BOM item reference'))
 
     # Note attached to this BOM line item
     note = models.CharField(max_length=500, blank=True, verbose_name=_('Note'), help_text=_('BOM item notes'))