diff --git a/src/device_manager/model/Devices.js b/src/device_manager/model/Devices.ts
similarity index 65%
rename from src/device_manager/model/Devices.js
rename to src/device_manager/model/Devices.ts
index 1d068e7ea..4115fa0a2 100644
--- a/src/device_manager/model/Devices.js
+++ b/src/device_manager/model/Devices.ts
@@ -1,6 +1,6 @@
 import { Collection } from '../../common';
 import Device from './Device';
 
-export default class Devices extends Collection {}
+export default class Devices extends Collection<Device> {}
 
 Devices.prototype.model = Device;