diff --git a/atlas/migrations/0040_casecollection_group.py b/atlas/migrations/0040_casecollection_group.py
new file mode 100644
index 00000000..d3efddda
--- /dev/null
+++ b/atlas/migrations/0040_casecollection_group.py
@@ -0,0 +1,20 @@
+# Generated by Django 3.2.10 on 2022-04-21 16:45
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('generic', '0026_ciduser_generic_cid_cid_291418_idx'),
+        ('atlas', '0039_auto_20220408_2357'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='casecollection',
+            name='group',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='generic.cidusergroup'),
+        ),
+    ]
diff --git a/atlas/models.py b/atlas/models.py
index 84785f5b..431d74b1 100644
--- a/atlas/models.py
+++ b/atlas/models.py
@@ -38,6 +38,7 @@ from anatomy.models import Modality
 from generic.models import (
     CidUser,
     CidUserExam,
+    CidUserGroup,
     Examination,
     # Condition,
     ExamBase,
@@ -650,7 +651,7 @@ class CaseCollection(models.Model):
         CidUser, blank=True, related_name="casecollection_exams"
     )
 
-    group = models.ForeignKey("CidUserGroup", on_delete=models.SET_NULL, null=True, blank=True)
+    group = models.ForeignKey(CidUserGroup, on_delete=models.SET_NULL, null=True, blank=True)
 
 
     archive = models.BooleanField(default=False)