diff --git a/packages/types/src/history.ts b/packages/types/src/history.ts
index 2bb79be1bc..93ac9bdf4c 100644
--- a/packages/types/src/history.ts
+++ b/packages/types/src/history.ts
@@ -10,7 +10,7 @@ export const historyItemSchema = z.object({
 	parentTaskId: z.string().optional(),
 	number: z.number(),
 	ts: z.number(),
-	title: z.string().optional(),
+	title: z.string().max(255).optional(),
 	task: z.string(),
 	tokensIn: z.number(),
 	tokensOut: z.number(),