diff --git a/.changeset/quiet-doors-wave.md b/.changeset/quiet-doors-wave.md
new file mode 100644
index 00000000000..2383c03db1e
--- /dev/null
+++ b/.changeset/quiet-doors-wave.md
@@ -0,0 +1,5 @@
+---
+'@clerk/backend': patch
+---
+
+Allow `null` for `period_end` in `BillingSubscriptionItemWebhookEventJSON`
diff --git a/packages/backend/src/api/resources/JSON.ts b/packages/backend/src/api/resources/JSON.ts
index 6128e1ddc16..9076779828d 100644
--- a/packages/backend/src/api/resources/JSON.ts
+++ b/packages/backend/src/api/resources/JSON.ts
@@ -904,7 +904,7 @@ export interface BillingSubscriptionItemWebhookEventJSON extends ClerkResourceJS
   proration_date: string;
   plan_period: 'month' | 'annual';
   period_start: number;
-  period_end?: number;
+  period_end: number | null;
   canceled_at?: number;
   past_due_at?: number;
   lifetime_paid: number;