diff --git a/src/lib/schemas/ticket.ts b/src/lib/schemas/ticket.ts
index c36de89..3400bee 100644
--- a/src/lib/schemas/ticket.ts
+++ b/src/lib/schemas/ticket.ts
@@ -169,7 +169,7 @@ export const ticketSchema = z.object({
   updatedAt: z.coerce.date(),
   createdAt: z.coerce.date(),
   tags: z.array(z.string()).default([]),
-  lastTimelineEntry: z.string().optional(),
+  lastTimelineEntry: z.string().nullable().optional(),
   metrics: z
     .object({
       timeWaitingMinutes: z.number().nullable(),