diff --git a/scipost_django/finances/migrations/0031_alter_subsidyattachment_attachment.py b/scipost_django/finances/migrations/0031_alter_subsidyattachment_attachment.py
new file mode 100644
index 0000000000000000000000000000000000000000..b1dab5cc470384d3c8060d89ba0d69f314e5a4bb
--- /dev/null
+++ b/scipost_django/finances/migrations/0031_alter_subsidyattachment_attachment.py
@@ -0,0 +1,20 @@
+# Generated by Django 3.2.18 on 2024-03-12 19:36
+
+from django.db import migrations, models
+import finances.models
+import scipost.storage
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('finances', '0030_auto_20240312_1822'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='subsidyattachment',
+            name='attachment',
+            field=models.FileField(max_length=256, storage=scipost.storage.SecureFileStorage(), upload_to=finances.models.subsidy_attachment_path),
+        ),
+    ]
diff --git a/scipost_django/finances/models.py b/scipost_django/finances/models.py
index e80b061607e7d487c64bc2916b7551f91a7d8901..b9fcd140da5a53fb90707f47c851c2aecfba6b55 100644
--- a/scipost_django/finances/models.py
+++ b/scipost_django/finances/models.py
@@ -241,6 +241,7 @@ class SubsidyAttachment(models.Model):
     )
 
     attachment = models.FileField(
+        max_length=256,
         upload_to=subsidy_attachment_path,
         storage=SecureFileStorage(),
     )