diff --git a/shiftregister/app/migrations/0005_alter_helper_phone.py b/shiftregister/app/migrations/0005_alter_helper_phone.py
new file mode 100644
index 0000000..a9a46e9
--- /dev/null
+++ b/shiftregister/app/migrations/0005_alter_helper_phone.py
@@ -0,0 +1,20 @@
+# Generated by Django 4.0.4 on 2022-04-22 00:06
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("app", "0004_shiftregistration_reminder_sent"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="helper",
+            name="phone",
+            field=models.CharField(
+                editable=False, max_length=200, primary_key=True, serialize=False
+            ),
+        ),
+    ]
diff --git a/shiftregister/app/tasks.py b/shiftregister/app/tasks.py
index b368d1d..2f3de06 100644
--- a/shiftregister/app/tasks.py
+++ b/shiftregister/app/tasks.py
@@ -1,5 +1,6 @@
 from celery import shared_task
 
+
 @shared_task
 def test():
-    return 'Hello, Celery!'
+    return "Hello, Celery!"
diff --git a/shiftregister/celery.py b/shiftregister/celery.py
index 7e3f1d1..e343fd7 100644
--- a/shiftregister/celery.py
+++ b/shiftregister/celery.py
@@ -6,6 +6,6 @@ os.environ.setdefault("DJANGO_SETTINGS_MODULE", "shiftregister.settings")
 
 app = Celery("shiftregister")
 
-app.config_from_object("django.conf:settings", namespace='CELERY')
+app.config_from_object("django.conf:settings", namespace="CELERY")
 
 app.autodiscover_tasks()