diff --git a/frontend/src/kanban-board/kanban-boards.tsx b/frontend/src/kanban-board/kanban-boards.tsx
index f44ccb4..a4a9634 100644
--- a/frontend/src/kanban-board/kanban-boards.tsx
+++ b/frontend/src/kanban-board/kanban-boards.tsx
@@ -40,9 +40,9 @@ export const KanbanBoards = observer((props: Props) => {
 	const onIssuesRefreshClick = (e: React.MouseEvent) => {
 		if (e.target !== e.currentTarget) return;
 		e.stopPropagation();
-		const rawInput = prompt("Force issues refresh (delimiters - space, comma, semicolon or tab)", "");
+		const rawInput = prompt("Force issues refresh (delimiters - space, comma, semicolon, tab or new line)", "");
 		if (!rawInput) return;
-		const list = rawInput.split(" ,;\t").map(item => Number(item)).filter(item => Number.isFinite(item));
+		const list = rawInput.split(/[ ,;\t\n\r]/).map(item => Number(item)).filter(item => (Number.isFinite(item) && item > 0));
 		if (!list) return;
 		axios.post(`/redmine-event-emitter/append-issues`, list);
 	};