diff --git a/package.json b/package.json
index 00df9ea..b3931a0 100644
--- a/package.json
+++ b/package.json
@@ -4,14 +4,14 @@
 	"license": "MIT",
 	"homepage": "https://awehook.github.io/react-mindmap/",
 	"dependencies": {
-		"@blink-mind/core": "0.0.20-beta.5",
-		"@blink-mind/icons": "0.0.20-beta.5",
-		"@blink-mind/plugin-json-serializer": "0.0.20-beta.5",
-		"@blink-mind/plugin-rich-text-editor": "0.0.20-beta.5",
-		"@blink-mind/plugin-theme-selector": "0.0.20-beta.5",
-		"@blink-mind/plugin-topology-diagram": "0.0.20-beta.5",
-		"@blink-mind/plugins": "0.0.20-beta.5",
-		"@blink-mind/renderer-react": "0.0.20-beta.5",
+		"@blink-mind/core": "0.0.20-beta.6",
+		"@blink-mind/icons": "0.0.20-beta.6",
+		"@blink-mind/plugin-json-serializer": "0.0.20-beta.6",
+		"@blink-mind/plugin-rich-text-editor": "0.0.20-beta.6",
+		"@blink-mind/plugin-theme-selector": "0.0.20-beta.6",
+		"@blink-mind/plugin-topology-diagram": "0.0.20-beta.6",
+		"@blink-mind/plugins": "0.0.20-beta.6",
+		"@blink-mind/renderer-react": "0.0.20-beta.6",
 		"@blueprintjs/core": "^3.17.2",
 		"classnames": "^2.2.6",
 		"cross-env": "^6.0.3",
diff --git a/src/component/toolbar/toolbar.js b/src/component/toolbar/toolbar.js
index 7f59a8e..ad9d620 100644
--- a/src/component/toolbar/toolbar.js
+++ b/src/component/toolbar/toolbar.js
@@ -1,7 +1,7 @@
 import React from "react";
 import cx from "classnames";
 import "./Toolbar.css";
-import { iconClassName, Icon } from "@blink-mind/renderer-react";
+import { iconClassName } from "@blink-mind/renderer-react";
 import { ToolbarItemOpen } from "./toolbar-item-open";
 import { ToolbarItemLayout } from "./toolbar-item-layout";
 import { ToolbarItemTheme } from "./toolbar-item-theme";
diff --git a/src/utils/index.js b/src/utils/index.js
index 5ae7b7f..fc69606 100644
--- a/src/utils/index.js
+++ b/src/utils/index.js
@@ -1,12 +1,4 @@
-import { Model } from "@blink-mind/core";
-
-export function createKey() {
-  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
-    const r = (Math.random() * 16) | 0,
-      v = c == 'x' ? r : (r & 0x3) | 0x8;
-    return v.toString(16);
-  });
-}
+import { Model, createKey } from "@blink-mind/core";
 
 export const downloadFile = (url, filename) => {
   const link = document.createElement("a");
@@ -16,7 +8,6 @@ export const downloadFile = (url, filename) => {
 };
 
 export function generateSimpleModel() {
-
   const rootKey = createKey();
 
   return Model.create({
@@ -24,7 +15,7 @@ export function generateSimpleModel() {
     topics: [
       {
         key: rootKey,
-        blocks: [{ type: "CONTENT", data: "MainTopic" }],
+        blocks: [{ type: "CONTENT", data: "MainTopic" }]
       }
     ]
   });