diff --git a/backend/src/ee/routes/v1/access-approval-request-router.ts b/backend/src/ee/routes/v1/access-approval-request-router.ts
index f735b4363..8a7ccfdef 100644
--- a/backend/src/ee/routes/v1/access-approval-request-router.ts
+++ b/backend/src/ee/routes/v1/access-approval-request-router.ts
@@ -23,7 +23,7 @@ export const registerAccessApprovalRequestRouter = async (server: FastifyZodProv
         permissions: z.any().array(),
         isTemporary: z.boolean(),
         temporaryRange: z.string().optional(),
-        note: z.string().optional()
+        note: z.string().max(255).optional()
       }),
       querystring: z.object({
         projectSlug: z.string().trim()