diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index f9e61f3..8a1c749 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -46,10 +46,6 @@ class Core {
     console.log('index');
   }
 
-  getData() {
-    return this._data;
-  }
-
   scale(ratio: number) {
     this._board.scale(ratio);
   }
@@ -62,6 +58,10 @@ class Core {
     this._board.scrollY(y);
   }
 
+  getData(): TypeData {
+    return JSON.parse(JSON.stringify(this._data));
+  }
+
   setData(data: TypeData) {
     return this._data = data;
   }
diff --git a/packages/types/src/lib/data.ts b/packages/types/src/lib/data.ts
index bd850be..1ba5178 100644
--- a/packages/types/src/lib/data.ts
+++ b/packages/types/src/lib/data.ts
@@ -1,15 +1,11 @@
 import { TypeElemDesc, TypeElement } from './element';
 
 
-type TypeDataBase = {
+type TypeData = {
   elements: TypeElement<keyof TypeElemDesc>[];
   bgColor?: string;
 }
 
-
-type TypeData = TypeDataBase & {}
-
 export {
-  TypeDataBase,
   TypeData
 }
\ No newline at end of file