diff --git a/src/commands/model/Commands.js b/src/commands/model/Commands.ts
similarity index 65%
rename from src/commands/model/Commands.js
rename to src/commands/model/Commands.ts
index b0829a3f3..832e30cd2 100644
--- a/src/commands/model/Commands.js
+++ b/src/commands/model/Commands.ts
@@ -1,6 +1,6 @@
 import { Collection } from '../../common';
 import Command from './Command';
 
-export default class Commands extends Collection {}
+export default class Commands extends Collection<Command> {}
 
 Commands.prototype.model = Command;