diff --git a/public/sw.js b/public/sw.js
index bd6abf5..6aa9cb5 100644
--- a/public/sw.js
+++ b/public/sw.js
@@ -1,4 +1,4 @@
-const CACHE = 'gj-v1'
+const CACHE = 'gj-__BUILD_TIME__'
 
 self.addEventListener('install', (e) => {
   e.waitUntil(
diff --git a/public/vite.svg b/public/vite.svg
deleted file mode 100644
index e7b8dfb..0000000
--- a/public/vite.svg
+++ /dev/null
@@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="31.88" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 257"><defs><linearGradient id="IconifyId1813088fe1fbc01fb466" x1="-.828%" x2="57.636%" y1="7.652%" y2="78.411%"><stop offset="0%" stop-color="#41D1FF"></stop><stop offset="100%" stop-color="#BD34FE"></stop></linearGradient><linearGradient id="IconifyId1813088fe1fbc01fb467" x1="43.376%" x2="50.316%" y1="2.242%" y2="89.03%"><stop offset="0%" stop-color="#FFEA83"></stop><stop offset="8.333%" stop-color="#FFDD35"></stop><stop offset="100%" stop-color="#FFA800"></stop></linearGradient></defs><path fill="url(#IconifyId1813088fe1fbc01fb466)" d="M255.153 37.938L134.897 252.976c-2.483 4.44-8.862 4.466-11.382.048L.875 37.958c-2.746-4.814 1.371-10.646 6.827-9.67l120.385 21.517a6.537 6.537 0 0 0 2.322-.004l117.867-21.483c5.438-.991 9.574 4.796 6.877 9.62Z"></path><path fill="url(#IconifyId1813088fe1fbc01fb467)" d="M185.432.063L96.44 17.501a3.268 3.268 0 0 0-2.634 3.014l-5.474 92.456a3.268 3.268 0 0 0 3.997 3.378l24.777-5.718c2.318-.535 4.413 1.507 3.936 3.838l-7.361 36.047c-.495 2.426 1.782 4.5 4.151 3.78l15.304-4.649c2.372-.72 4.652 1.36 4.15 3.788l-11.698 56.621c-.732 3.542 3.979 5.473 5.943 2.437l1.313-2.028l72.516-144.72c1.215-2.423-.88-5.186-3.54-4.672l-25.505 4.922c-2.396.462-4.435-1.77-3.759-4.114l16.646-57.705c.677-2.35-1.37-4.583-3.769-4.113Z"></path></svg>
\ No newline at end of file
diff --git a/vite.config.ts b/vite.config.ts
index d4b962d..50b65ec 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -1,9 +1,25 @@
 import { defineConfig } from 'vite'
 import react from '@vitejs/plugin-react'
+import fs from 'fs'
+import path from 'path'
+
+function swBuildTimePlugin() {
+  return {
+    name: 'sw-build-time',
+    closeBundle() {
+      const swPath = path.resolve(__dirname, 'dist/sw.js')
+      if (fs.existsSync(swPath)) {
+        const content = fs.readFileSync(swPath, 'utf-8')
+        const timestamp = Date.now().toString()
+        fs.writeFileSync(swPath, content.replace('__BUILD_TIME__', timestamp))
+      }
+    },
+  }
+}
 
 // https://vite.dev/config/
 export default defineConfig({
-  plugins: [react()],
+  plugins: [react(), swBuildTimePlugin()],
   server: {
     port: 8000,
     strictPort: false,