diff --git a/src/PrinterRepository.mts b/src/PrinterRepository.mts
index 10f4d41..d53066f 100644
--- a/src/PrinterRepository.mts
+++ b/src/PrinterRepository.mts
@@ -1,5 +1,6 @@
 import { Printer } from './Printer.mjs'
 import fs from 'fs'
+import { PrinterJSON } from './types.mjs'
 
 export class PrinterRepository {
   constructor() {
@@ -13,9 +14,12 @@ export class PrinterRepository {
   static instance: PrinterRepository
 
   loadFromJSON() {
-    const json = JSON.parse(fs.readFileSync('./data/printers.json', 'utf8'))
+    const json: PrinterJSON[] = JSON.parse(
+      fs.readFileSync('./data/printers.json', 'utf8')
+    )
+
     this.printers = json.map(
-      ({ name, ip, model }: Printer) => new Printer(name, ip, model)
+      ({ name, ip, model }) => new Printer(name, ip, model)
     )
   }
 
diff --git a/src/types.mts b/src/types.mts
index 1085ff1..49ea348 100644
--- a/src/types.mts
+++ b/src/types.mts
@@ -59,7 +59,7 @@ export type PrinterInfo = {
   }
 }
 
-export type Printer = {
+export type PrinterJSON = {
   name: string
   ip: string
   model: PrinterModel