diff --git a/elections/migrations/0033_inactive_users.py b/elections/migrations/0033_inactive_users.py
new file mode 100644
index 0000000..0c98cae
--- /dev/null
+++ b/elections/migrations/0033_inactive_users.py
@@ -0,0 +1,21 @@
+# Generated by Django 3.2.6 on 2021-10-04 07:49
+
+from django.db import migrations
+
+
+def set_users_inactive(apps, schema_editor):
+    db_alias = schema_editor.connection.alias
+    User = apps.get_model("elections", "User")
+
+    User.objects.using(db_alias).filter(election__isnull=False).update(is_active=False)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("elections", "0032_auto_20210820_0023"),
+    ]
+
+    operations = [
+        migrations.RunPython(set_users_inactive, migrations.RunPython.noop),
+    ]
diff --git a/elections/utils.py b/elections/utils.py
index 32499f7..27dfc97 100644
--- a/elections/utils.py
+++ b/elections/utils.py
@@ -334,6 +334,7 @@ def create_users(election, csv_file):
             username=f"{election.id}__{username}",
             email=email,
             full_name=full_name,
+            is_active=False,
         )
         for (username, full_name, email) in reader
     ]