diff --git a/src/pretix/api/migrations/0007_alter_webhookcall_target_url.py b/src/pretix/api/migrations/0007_alter_webhookcall_target_url.py
new file mode 100644
index 0000000000..89171d721c
--- /dev/null
+++ b/src/pretix/api/migrations/0007_alter_webhookcall_target_url.py
@@ -0,0 +1,18 @@
+# Generated by Django 3.2.4 on 2021-09-15 11:06
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixapi', '0006_alter_webhook_target_url'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='webhookcall',
+            name='target_url',
+            field=models.URLField(max_length=255),
+        ),
+    ]
diff --git a/src/pretix/api/models.py b/src/pretix/api/models.py
index dd6bbe589e..ed6784428a 100644
--- a/src/pretix/api/models.py
+++ b/src/pretix/api/models.py
@@ -120,7 +120,7 @@ class WebHookEventListener(models.Model):
 class WebHookCall(models.Model):
     webhook = models.ForeignKey('WebHook', on_delete=models.CASCADE, related_name='calls')
     datetime = models.DateTimeField(auto_now_add=True)
-    target_url = models.URLField()
+    target_url = models.URLField(max_length=255)
     action_type = models.CharField(max_length=255)
     is_retry = models.BooleanField(default=False)
     execution_time = models.FloatField(null=True)