diff --git a/src/app/api/salarys/index.ts b/src/app/api/salarys/index.ts
index baed583..4e26f94 100644
--- a/src/app/api/salarys/index.ts
+++ b/src/app/api/salarys/index.ts
@@ -5,11 +5,11 @@ import "server-only";
 
 export interface SalaryResult {
   id: number;
-  lowerLimit: String;
-  upperLimit: String;
+  lowerLimit: string;
+  upperLimit: string;
   salaryPoint: number;
   salary: number;
-  hourlyRate: String;
+  hourlyRate: string;
 }
 
 export const preloadSalarys = () => {