diff --git a/membershipworks/migrations/0003_alter_transaction_sid.py b/membershipworks/migrations/0003_alter_transaction_sid.py
new file mode 100644
index 0000000..6a13f96
--- /dev/null
+++ b/membershipworks/migrations/0003_alter_transaction_sid.py
@@ -0,0 +1,17 @@
+# Generated by Django 5.0 on 2023-12-20 06:03
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("membershipworks", "0002_remove_member_accepted_covid19_policy_and_more"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="transaction",
+            name="sid",
+            field=models.CharField(blank=True, max_length=256, null=True),
+        ),
+    ]
diff --git a/membershipworks/models.py b/membershipworks/models.py
index 44bc5b0..14f676d 100644
--- a/membershipworks/models.py
+++ b/membershipworks/models.py
@@ -274,7 +274,7 @@ class MemberFlag(BaseModel):
 
 
 class Transaction(BaseModel):
-    sid = models.CharField(max_length=27, null=True, blank=True)
+    sid = models.CharField(max_length=256, null=True, blank=True)
     member = models.ForeignKey(
         Member,
         on_delete=models.PROTECT,