diff --git a/bag_transfer/accession/models.py b/bag_transfer/accession/models.py
index 5554a22e..67adc578 100644
--- a/bag_transfer/accession/models.py
+++ b/bag_transfer/accession/models.py
@@ -42,3 +42,4 @@ class Accession(models.Model):
         choices=PROCESS_STATUS_CHOICES, default=10, null=True, blank=True
     )
     archivesspace_identifier = models.CharField(max_length=255, blank=True, null=True)
+    archivesspace_group_identifier = models.CharField(max_length=255, blank=True, null=True)
diff --git a/bag_transfer/migrations/0055_accession_archivesspace_group_identifier.py b/bag_transfer/migrations/0055_accession_archivesspace_group_identifier.py
new file mode 100644
index 00000000..68e5f482
--- /dev/null
+++ b/bag_transfer/migrations/0055_accession_archivesspace_group_identifier.py
@@ -0,0 +1,18 @@
+# Generated by Django 4.2.18 on 2025-02-19 01:07
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bag_transfer', '0054_alter_transfer_machine_file_size'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='accession',
+            name='archivesspace_group_identifier',
+            field=models.CharField(blank=True, max_length=255, null=True),
+        ),
+    ]
diff --git a/docker-compose.yml b/docker-compose.yml
index 81e16f1d..9508a590 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,5 +1,3 @@
-version: '3'
-
 services:
   db:
     image: mysql:8.0