diff --git a/src/draggable-grid.tsx b/src/draggable-grid.tsx
index 9a11f5d..c252337 100644
--- a/src/draggable-grid.tsx
+++ b/src/draggable-grid.tsx
@@ -16,7 +16,7 @@ export interface IOnLayoutEvent {
   nativeEvent: { layout: { x: number; y: number; width: number; height: number } }
 };
 
-interface IBaseItemType {
+export interface IBaseItemType {
   key:string;
 }
 
diff --git a/src/index.ts b/src/index.ts
index 33b2284..e206ab6 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,8 +1,9 @@
-import { IDraggableGridProps,DraggableGrid } from './draggable-grid';
+import { IDraggableGridProps, DraggableGrid, IBaseItemType } from './draggable-grid';
+
+export type IDraggableGridProps<T extends IBaseItemType> = IDraggableGridProps<T>
 
 export {
   DraggableGrid,
-  IDraggableGridProps,
 };
 
-export default DraggableGrid;
\ No newline at end of file
+export default DraggableGrid;
diff --git a/tsconfig.json b/tsconfig.json
index 9bcd0c5..b29c1d9 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -9,6 +9,7 @@
     "target": "es5",
     "outDir": "built",
     "sourceMap": true,
+    "isolatedModules": true,
     "skipLibCheck": true
   },
   "exclude": ["node_modules", "demo"]