diff --git a/types/index.ts b/types/index.ts
index 416a85b..8633c73 100644
--- a/types/index.ts
+++ b/types/index.ts
@@ -30,8 +30,8 @@ export interface COEResult {
   month: string;
   bidding_no: string;
   vehicle_class: string;
-  quota: string;
-  bids_success: string;
-  bids_received: string;
-  premium: string;
+  quota: number;
+  bids_success: number;
+  bids_received: number;
+  premium: number;
 }