diff --git a/webinars/migrations/0006_alter_webinar_spaces_remaining.py b/webinars/migrations/0006_alter_webinar_spaces_remaining.py
new file mode 100644
index 000000000..c96cb1c36
--- /dev/null
+++ b/webinars/migrations/0006_alter_webinar_spaces_remaining.py
@@ -0,0 +1,18 @@
+# Generated by Django 5.1.1 on 2025-01-08 16:14
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("webinars", "0005_webinar_webinar_collections"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="webinar",
+            name="spaces_remaining",
+            field=models.PositiveIntegerField(blank=True, null=True),
+        ),
+    ]
diff --git a/webinars/models.py b/webinars/models.py
index 678f5118e..f35a19b66 100644
--- a/webinars/models.py
+++ b/webinars/models.py
@@ -45,7 +45,7 @@ class Webinar(models.Model):
     title = models.CharField(max_length=255)
     description = models.TextField()
     speakers = models.CharField(max_length=255)
-    spaces_remaining = models.PositiveIntegerField()
+    spaces_remaining = models.PositiveIntegerField(blank=True, null=True)
     registration_url = models.URLField()
     registration_link_text = models.CharField(max_length=255)
     display_on_tutor_page = models.BooleanField(default=False)