diff --git a/DysonNetwork.Drive/Billing/QuotaService.cs b/DysonNetwork.Drive/Billing/QuotaService.cs
index a59f294..07e258c 100644
--- a/DysonNetwork.Drive/Billing/QuotaService.cs
+++ b/DysonNetwork.Drive/Billing/QuotaService.cs
@@ -30,7 +30,7 @@ public class QuotaService(
         
         var (based, extra) = await GetQuotaVerbose(accountId);
         var quota = based + extra;
-        await cache.SetAsync(cacheKey, quota);
+        await cache.SetAsync(cacheKey, quota, expiry: TimeSpan.FromMinutes(30));
         return quota;
     }