diff --git a/src/app/components/tabels/table-component.base.ts b/src/app/components/tabels/table-component.base.ts
index 9f1424d..8764ff3 100644
--- a/src/app/components/tabels/table-component.base.ts
+++ b/src/app/components/tabels/table-component.base.ts
@@ -1,7 +1,7 @@
 import {sortByNumberAscending, sortByStringAscending, sortByDateAscending} from '../../services/sorting.service';
-import {Priority, ScrumTask} from '../../services/backend.service';
+import {Priority, ScrumTask, ScrumUserstory, ScrumSprint} from '../../services/backend.service';
 
-export abstract class TableComponentBase<T> {
+export abstract class TableComponentBase<T extends ScrumTask | ScrumUserstory | ScrumSprint> {
   public sortBy: string;
   public sortDescending = false;
   public items: T[] = [];