diff --git a/src/client/dd-hub-react/src/api/document-service.ts b/src/client/dd-hub-react/src/api/document-service.ts
index ec6fc4b..5d9e4be 100644
--- a/src/client/dd-hub-react/src/api/document-service.ts
+++ b/src/client/dd-hub-react/src/api/document-service.ts
@@ -1,13 +1,13 @@
 import { _documents } from "src/_mock"
 
-export type Doc = {
-    id: number,
-    name: string,
-    data: Uint8Array,
-    addedWhen: Date,
-    addedWho: string,
-    changedWhen?: Date,
-    changedWho?: string
+export class Doc {
+    id!: number;
+    name!: string;
+    data!: Uint8Array;
+    addedWhen!: Date;
+    addedWho!: string;
+    changedWhen?: Date;
+    changedWho?: string;
 }
 
 export type DocQuery = {