diff --git a/packages/core/src/tools/drawing-tool.ts b/packages/core/src/tools/drawing-tool.ts
index e3992ec0..6501e71c 100644
--- a/packages/core/src/tools/drawing-tool.ts
+++ b/packages/core/src/tools/drawing-tool.ts
@@ -1,13 +1,14 @@
 import Konva from 'konva';
 
 import { Tool } from '../types';
-import { Point } from '../utils';
+import { guid, Point } from '../utils';
 
 import { selectTool } from './select-tool';
 
 export const drawingTool = (): Tool => {
   let points: Point[] = [];
   const line = new Konva.Line({
+    id: guid(),
     stroke: 'black',
     strokeWidth: 2,
     globalCompositeOperation: 'source-over',
diff --git a/packages/core/src/tools/ellipse-tool.ts b/packages/core/src/tools/ellipse-tool.ts
index 12ce7217..7b582080 100644
--- a/packages/core/src/tools/ellipse-tool.ts
+++ b/packages/core/src/tools/ellipse-tool.ts
@@ -1,12 +1,13 @@
 import { Ellipse } from '../customs/ellipse';
 import { AppMouseEvent, Tool } from '../types';
-import { Point } from '../utils';
+import { guid, Point } from '../utils';
 
 import { selectTool } from './select-tool';
 
 export const ellipseTool = (): Tool => {
   const startPointer: Point = new Point(0, 0);
   const ellipse: Ellipse = new Ellipse({
+    id: guid(),
     radiusX: 0,
     radiusY: 0,
     fill: 'transparent',
diff --git a/packages/core/src/tools/image-tool.ts b/packages/core/src/tools/image-tool.ts
index 6ea7cac2..f5d7462d 100644
--- a/packages/core/src/tools/image-tool.ts
+++ b/packages/core/src/tools/image-tool.ts
@@ -1,16 +1,14 @@
-import { readeFile, selectFile } from '@pictode/utils';
-
 import { Image as Img } from '../customs/image';
 import { Tool } from '../types';
+import { guid, readeFile, selectFile } from '../utils';
 
 import { selectTool } from './select-tool';
 
 export const imageTool = (): Tool => {
   const imageObject = new Image();
   const img = new Img({
+    id: guid(),
     image: imageObject,
-    stroke: 'black',
-    strokeWidth: 2,
   });
 
   return {
diff --git a/packages/core/src/tools/line-tool.ts b/packages/core/src/tools/line-tool.ts
index 1a6972ff..f77df936 100644
--- a/packages/core/src/tools/line-tool.ts
+++ b/packages/core/src/tools/line-tool.ts
@@ -1,6 +1,6 @@
 import { Line } from '../customs/line';
 import { Tool } from '../types';
-import { Point } from '../utils';
+import { guid, Point } from '../utils';
 
 import { selectTool } from './select-tool';
 
@@ -10,6 +10,7 @@ const flatPoints = (points: Point[]): number[] =>
 export const lineTool = (): Tool => {
   let points: Point[] = [];
   let line: Line = new Line({
+    id: guid(),
     points: flatPoints(points),
     fill: 'transparent',
     stroke: 'black',
diff --git a/packages/core/src/tools/rect-tool.ts b/packages/core/src/tools/rect-tool.ts
index 6774c6bf..2c5a5864 100644
--- a/packages/core/src/tools/rect-tool.ts
+++ b/packages/core/src/tools/rect-tool.ts
@@ -1,12 +1,13 @@
 import { Rect } from '../customs/rect';
 import { AppMouseEvent, Tool } from '../types';
-import { Point } from '../utils';
+import { guid, Point } from '../utils';
 
 import { selectTool } from './select-tool';
 
 export const rectTool = (): Tool => {
   const startPointer: Point = new Point(0, 0);
   const rectangle: Rect = new Rect({
+    id: guid(),
     fill: 'transparent',
     stroke: 'black',
     strokeWidth: 2,
diff --git a/packages/core/src/tools/regular-polygon-tool.ts b/packages/core/src/tools/regular-polygon-tool.ts
index 4438a3dc..d612d94f 100644
--- a/packages/core/src/tools/regular-polygon-tool.ts
+++ b/packages/core/src/tools/regular-polygon-tool.ts
@@ -1,12 +1,13 @@
 import { RegularPolygon } from '../customs/regular-polygon';
 import { Tool } from '../types';
-import { Point } from '../utils';
+import { guid, Point } from '../utils';
 
 import { selectTool } from './select-tool';
 
 export const regularPolygonTool = (): Tool => {
   const startPointer: Point = new Point(0, 0);
   const regularPolygon: RegularPolygon = new RegularPolygon({
+    id: guid(),
     fill: 'transparent',
     stroke: 'black',
     strokeWidth: 2,
diff --git a/packages/core/src/utils/index.ts b/packages/core/src/utils/index.ts
index 871a9637..b6d5699c 100644
--- a/packages/core/src/utils/index.ts
+++ b/packages/core/src/utils/index.ts
@@ -2,6 +2,8 @@ import { AppConfig } from '../types';
 
 export * from './math';
 
+export { guid, readeFile, selectFile } from '@pictode/utils';
+
 export const DEFAULT_APP_CONFIG: AppConfig = {
   backgroundColor: '#ffffff',
 };