diff --git a/crabfit-frontend/public/i18n/en/common.json b/crabfit-frontend/public/i18n/en/common.json
index 27bfa42..4012234 100644
--- a/crabfit-frontend/public/i18n/en/common.json
+++ b/crabfit-frontend/public/i18n/en/common.json
@@ -54,5 +54,13 @@
     "language": {
       "label": "Language"
     }
+  },
+  "update": {
+    "heading": "Crab Fit has been updated",
+    "body": "A new version of Crab Fit is available, which includes updates, fixes, and new features.",
+    "buttons": {
+      "close": "Close",
+      "reload": "Reload"
+    }
   }
 }
diff --git a/crabfit-frontend/src/App.tsx b/crabfit-frontend/src/App.tsx
index dd97904..7a4b0aa 100644
--- a/crabfit-frontend/src/App.tsx
+++ b/crabfit-frontend/src/App.tsx
@@ -1,8 +1,9 @@
 import { useState, useEffect, useCallback, Suspense, lazy } from 'react';
 import { BrowserRouter, Switch, Route } from 'react-router-dom';
 import { ThemeProvider, Global } from '@emotion/react';
+import { Workbox } from 'workbox-window';
 
-import { Settings, Loading, Egg } from 'components';
+import { Settings, Loading, Egg, UpdateDialog } from 'components';
 
 import { useSettingsStore } from 'stores';
 import theme from 'theme';
@@ -15,6 +16,8 @@ const Create = lazy(() => import('pages/Create/Create'));
 const Help = lazy(() => import('pages/Help/Help'));
 const Privacy = lazy(() => import('pages/Privacy/Privacy'));
 
+const wb = new Workbox('sw.js');
+
 const App = () => {
   const colortheme = useSettingsStore(state => state.theme);
 	const darkQuery = window.matchMedia('(prefers-color-scheme: dark)');
@@ -25,6 +28,8 @@ const App = () => {
   const [eggVisible, setEggVisible] = useState(false);
   const [eggKey, setEggKey] = useState(0);
 
+  const [updateAvailable, setUpdateAvailable] = useState(false);
+
   const eggHandler = useCallback(
     event => {
       if (EGG_PATTERN.indexOf(event.key) < 0 || event.key !== EGG_PATTERN[eggCount]) {
@@ -56,6 +61,19 @@ const App = () => {
     };
   }, []);
 
+  useEffect(() => {
+    // Register service worker
+    if ('serviceWorker' in navigator && process.env.NODE_ENV === 'production') {
+      wb.addEventListener('installed', event => {
+        if (event.isUpdate) {
+          setUpdateAvailable(true);
+        }
+      });
+
+      wb.register();
+    }
+  }, []);
+
   useEffect(() => {
     document.addEventListener('keyup', eggHandler, false);
 
@@ -140,6 +158,12 @@ const App = () => {
           )} />
 				</Switch>
 
+        {updateAvailable && (
+          <Suspense fallback={<Loading />}>
+            <UpdateDialog onClose={() => setUpdateAvailable(false)} />
+          </Suspense>
+        )}
+
         {eggVisible && <Egg eggKey={eggKey} onClose={() => setEggVisible(false)} />}
 			</ThemeProvider>
 		</BrowserRouter>
diff --git a/crabfit-frontend/src/components/UpdateDialog/UpdateDialog.tsx b/crabfit-frontend/src/components/UpdateDialog/UpdateDialog.tsx
new file mode 100644
index 0000000..f087183
--- /dev/null
+++ b/crabfit-frontend/src/components/UpdateDialog/UpdateDialog.tsx
@@ -0,0 +1,24 @@
+import { Button } from 'components';
+import { useTranslation } from 'react-i18next';
+
+import {
+  Wrapper,
+  ButtonWrapper,
+} from './updateDialogStyle';
+
+const UpdateDialog = ({ onClose }) => {
+  const { t } = useTranslation('common');
+
+  return (
+  	<Wrapper>
+      <h2>{t('common:update.heading')}</h2>
+      <p>{t('common:update.body')}</p>
+      <ButtonWrapper>
+        <Button secondary onClick={onClose}>{t('common:update.buttons.close')}</Button>
+  			<Button onClick={() => window.location.reload()}>{t('common:update.buttons.reload')}</Button>
+      </ButtonWrapper>
+  	</Wrapper>
+  );
+}
+
+export default UpdateDialog;
diff --git a/crabfit-frontend/src/components/UpdateDialog/updateDialogStyle.ts b/crabfit-frontend/src/components/UpdateDialog/updateDialogStyle.ts
new file mode 100644
index 0000000..139f211
--- /dev/null
+++ b/crabfit-frontend/src/components/UpdateDialog/updateDialogStyle.ts
@@ -0,0 +1,34 @@
+import styled from '@emotion/styled';
+
+export const Wrapper = styled.div`
+  position: fixed;
+  bottom: 20px;
+  right: 20px;
+  background-color: ${props => props.theme.background};
+  ${props => props.theme.mode === 'dark' && `
+    border: 1px solid ${props.theme.primaryBackground};
+  `}
+  z-index: 900;
+  padding: 20px 26px;
+  border-radius: 3px;
+  width: 400px;
+  box-sizing: border-box;
+  max-width: calc(100% - 20px);
+  box-shadow: 0 3px 6px 0 rgba(0,0,0,.3);
+
+  & h2 {
+    margin: 0;
+    font-size: 1.3rem;
+  }
+  & p {
+    margin: 16px 0 24px;
+    font-size: 1rem;
+  }
+`;
+
+export const ButtonWrapper = styled.div`
+  display: flex;
+  align-items: center;
+  justify-content: flex-end;
+  gap: 16px;
+`;
diff --git a/crabfit-frontend/src/components/index.ts b/crabfit-frontend/src/components/index.ts
index de04478..1b73344 100644
--- a/crabfit-frontend/src/components/index.ts
+++ b/crabfit-frontend/src/components/index.ts
@@ -18,6 +18,7 @@ export { default as Egg } from './Egg/Egg';
 export { default as Footer } from './Footer/Footer';
 export { default as Recents } from './Recents/Recents';
 export { default as Logo } from './Logo/Logo';
+export { default as UpdateDialog } from './UpdateDialog/UpdateDialog';
 
 export const _GoogleCalendar = () => import('./GoogleCalendar/GoogleCalendar');
 export const _OutlookCalendar = () => import('./OutlookCalendar/OutlookCalendar');
diff --git a/crabfit-frontend/src/index.tsx b/crabfit-frontend/src/index.tsx
index 7ea3f12..ed39b03 100644
--- a/crabfit-frontend/src/index.tsx
+++ b/crabfit-frontend/src/index.tsx
@@ -1,7 +1,6 @@
 import React from 'react';
 import ReactDOM from 'react-dom';
 import App from './App';
-import { Workbox } from 'workbox-window';
 import 'i18n';
 
 ReactDOM.render(
@@ -10,17 +9,3 @@ ReactDOM.render(
   </React.StrictMode>,
   document.getElementById('root')
 );
-
-if ('serviceWorker' in navigator) {
-  const wb = new Workbox('sw.js');
-
-  wb.addEventListener('installed', event => {
-    if (event.isUpdate) {
-      if (window.confirm(`New content is available!. Click OK to refresh`)) {
-        window.location.reload();
-      }
-    }
-  });
-
-  wb.register();
-}