diff --git a/src/pretix/base/migrations/0158_auto_20200724_0754.py b/src/pretix/base/migrations/0158_auto_20200724_0754.py
new file mode 100644
index 0000000000..8fbb41b22f
--- /dev/null
+++ b/src/pretix/base/migrations/0158_auto_20200724_0754.py
@@ -0,0 +1,51 @@
+# Generated by Django 3.0.8 on 2020-07-24 07:54
+
+from django.db import migrations, models
+
+import pretix.base.models.base
+import pretix.helpers.countries
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0157_auto_20200712_0932'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='cachedfile',
+            name='file',
+            field=models.FileField(max_length=255, null=True, upload_to=pretix.base.models.base.cachedfile_name),
+        ),
+        migrations.AlterField(
+            model_name='cartposition',
+            name='country',
+            field=pretix.helpers.countries.FastCountryField(countries=pretix.helpers.countries.CachedCountries, max_length=2, null=True),
+        ),
+        migrations.AlterField(
+            model_name='invoice',
+            name='invoice_from_country',
+            field=pretix.helpers.countries.FastCountryField(countries=pretix.helpers.countries.CachedCountries, max_length=2, null=True),
+        ),
+        migrations.AlterField(
+            model_name='invoice',
+            name='invoice_to_country',
+            field=pretix.helpers.countries.FastCountryField(countries=pretix.helpers.countries.CachedCountries, max_length=2, null=True),
+        ),
+        migrations.AlterField(
+            model_name='invoiceaddress',
+            name='country',
+            field=pretix.helpers.countries.FastCountryField(countries=pretix.helpers.countries.CachedCountries, max_length=2),
+        ),
+        migrations.AlterField(
+            model_name='orderposition',
+            name='country',
+            field=pretix.helpers.countries.FastCountryField(countries=pretix.helpers.countries.CachedCountries, max_length=2, null=True),
+        ),
+        migrations.AlterField(
+            model_name='taxrule',
+            name='home_country',
+            field=pretix.helpers.countries.FastCountryField(countries=pretix.helpers.countries.CachedCountries, max_length=2),
+        ),
+    ]
diff --git a/src/pretix/base/models/base.py b/src/pretix/base/models/base.py
index bdffb9d413..d679ac0638 100644
--- a/src/pretix/base/models/base.py
+++ b/src/pretix/base/models/base.py
@@ -27,7 +27,7 @@ class CachedFile(models.Model):
     date = models.DateTimeField(null=True, blank=True)
     filename = models.CharField(max_length=255)
     type = models.CharField(max_length=255)
-    file = models.FileField(null=True, blank=True, upload_to=cachedfile_name)
+    file = models.FileField(null=True, blank=True, upload_to=cachedfile_name, max_length=255)
 
 
 @receiver(post_delete, sender=CachedFile)