diff --git a/src/common/util/tree/hasLeaves.ts b/src/common/util/tree/hasLeaves.ts
index 79b8f58..6ed34f3 100644
--- a/src/common/util/tree/hasLeaves.ts
+++ b/src/common/util/tree/hasLeaves.ts
@@ -1,3 +1,3 @@
 import { TableNode } from '@table-library/react-table-library/types/table';
 
-export const hasLeaves = (node: TableNode) => !!node.nodes?.length;
+export const hasLeaves = <T extends TableNode>(node: T): boolean => !!node.nodes?.length;
diff --git a/src/common/util/tree/isLeaf.ts b/src/common/util/tree/isLeaf.ts
index 9e8a836..04dd84b 100644
--- a/src/common/util/tree/isLeaf.ts
+++ b/src/common/util/tree/isLeaf.ts
@@ -1,3 +1,3 @@
 import { TableNode } from '@table-library/react-table-library/types/table';
 
-export const isLeaf = (node: TableNode) => !node.nodes;
+export const isLeaf = <T extends TableNode>(node: T): boolean => !node.nodes;