diff --git a/src/src/components/Background/index.ts b/src/src/components/Background/index.ts
index c58192a..9b94741 100644
--- a/src/src/components/Background/index.ts
+++ b/src/src/components/Background/index.ts
@@ -1,13 +1,15 @@
-import { emitEvent, Requests } from './messages';
-import { State } from 'typesafe-reducer';
+import type { State } from 'typesafe-reducer';
 
-// Based on https://stackoverflow.com/a/50548409/8584605
-chrome.tabs.onUpdated.addListener(function (tabId, changeInfo) {
+import type { Requests } from './messages';
+import { emitEvent } from './messages';
+
+/** Based on https://stackoverflow.com/a/50548409/8584605 */
+chrome.tabs.onUpdated.addListener((tabId, changeInfo) => {
   if (changeInfo?.status === 'complete')
     emitEvent(tabId, { type: 'TabUpdate' }).catch(console.trace);
 });
 
-chrome.action.onClicked.addListener(function () {
+chrome.action.onClicked.addListener(() => {
   chrome.tabs.create({ url: 'https://calendar.google.com' });
 });
 
@@ -38,7 +40,7 @@ const requestHandlers: {
     request: Extract<Requests, State<TYPE>>['request']
   ) => Promise<Extract<Requests, State<TYPE>>['response']>;
 } = {
-  Authenticate: ({ interactive }) =>
+  Authenticate: async ({ interactive }) =>
     new Promise((resolve, reject) =>
       chrome.identity.getAuthToken({ interactive }, (token) =>
         typeof token === 'string'
@@ -46,12 +48,10 @@ const requestHandlers: {
           : reject(chrome.runtime.lastError)
       )
     ),
-  ReloadExtension: () =>
+  ReloadExtension: async () =>
     new Promise((resolve) => {
       chrome.tabs.reload();
       chrome.runtime.reload();
       resolve(undefined);
     }),
 };
-
-export {};
diff --git a/src/src/components/Contexts/AuthContext.tsx b/src/src/components/Contexts/AuthContext.tsx
index 0f0d663..1c57be3 100644
--- a/src/src/components/Contexts/AuthContext.tsx
+++ b/src/src/components/Contexts/AuthContext.tsx
@@ -2,18 +2,11 @@ import React from 'react';
 
 import { sendRequest } from '../Background/messages';
 
-type Authenticated = {
-  readonly authenticated: true;
-  readonly token: string;
+type Auth = {
+  readonly token: string | undefined;
+  readonly handleAuthenticate: (interactive: boolean) => Promise<void>;
 };
 
-type NotAuthenticated = {
-  readonly authenticated: false;
-  readonly handleAuthenticate: () => Promise<void>;
-};
-
-type Auth = Authenticated | NotAuthenticated;
-
 let unsafeToken: string | undefined = undefined;
 export const unsafeGetToken = () => unsafeToken;
 
@@ -22,16 +15,14 @@ export function AuthenticationProvider({
 }: {
   readonly children: React.ReactNode;
 }): JSX.Element {
+  const [token, setToken] = React.useState<string | undefined>(undefined);
   const handleAuthenticate = React.useCallback(
-    async (interactive = true) =>
+    async (interactive: boolean) =>
       sendRequest('Authenticate', { interactive })
         .then(({ token }) => {
           if (typeof token === 'string') {
             unsafeToken = token;
-            setAuth({
-              authenticated: true,
-              token,
-            });
+            setToken(token);
           } else console.warn('Authentication canceled');
         })
         .catch(console.error),
@@ -39,15 +30,18 @@ export function AuthenticationProvider({
   );
   React.useEffect(() => void handleAuthenticate(false), [handleAuthenticate]);
 
-  const [auth, setAuth] = React.useState<Auth>({
-    authenticated: false,
-    handleAuthenticate,
-  });
+  const auth = React.useMemo(
+    () => ({
+      token,
+      handleAuthenticate,
+    }),
+    [token, handleAuthenticate]
+  );
   return <AuthContext.Provider value={auth}>{children}</AuthContext.Provider>;
 }
 
 export const AuthContext = React.createContext<Auth>({
-  authenticated: false,
+  token: undefined,
   handleAuthenticate: () => {
     throw new Error('AuthContext is not defined');
   },
diff --git a/src/src/components/Contexts/CalendarsContext.tsx b/src/src/components/Contexts/CalendarsContext.tsx
index c38e90e..eb70dad 100644
--- a/src/src/components/Contexts/CalendarsContext.tsx
+++ b/src/src/components/Contexts/CalendarsContext.tsx
@@ -22,10 +22,11 @@ export function CalendarsSpy({
 }: {
   readonly children: React.ReactNode;
 }): JSX.Element {
-  const { authenticated } = React.useContext(AuthContext);
+  const { token } = React.useContext(AuthContext);
+  const isAuthenticated = typeof token === 'string';
   const [calendars] = useAsyncState<RA<CalendarListEntry>>(
     React.useCallback(async () => {
-      if (!authenticated) return undefined;
+      if (!isAuthenticated) return undefined;
       const response = await ajax(
         formatUrl(
           'https://www.googleapis.com/calendar/v3/users/me/calendarList',
@@ -49,7 +50,7 @@ export function CalendarsSpy({
         Array.from(calendars).sort(sortFunction(({ summary }) => summary))
       );
       return [...primary, ...secondary];
-    }, [authenticated]),
+    }, [isAuthenticated]),
     false
   );
 
diff --git a/src/src/components/Core/App.tsx b/src/src/components/Core/App.tsx
index 8ec02b0..7d01344 100644
--- a/src/src/components/Core/App.tsx
+++ b/src/src/components/Core/App.tsx
@@ -70,14 +70,16 @@ export function App(): JSX.Element | null {
           {debugOverlay}
           <Button.White
             aria-pressed={isOpen ? true : undefined}
-            onClick={
-              auth.authenticated
-                ? handleToggle
-                : (): void =>
-                    void auth
-                      .handleAuthenticate()
-                      .then(handleToggle)
-                      .catch(console.error)
+            /*
+             * Making the auth request even if already authenticated because
+             * the token may have expired. This is not a performance problem
+             * because token is cached by Google Chrome
+             */
+            onClick={(): void =>
+              void auth
+                .handleAuthenticate(true)
+                .then(handleToggle)
+                .catch(console.error)
             }
           >
             {commonText('calendarPlus')}
diff --git a/src/src/components/EventsStore/index.ts b/src/src/components/EventsStore/index.ts
index bac71bf..f50860f 100644
--- a/src/src/components/EventsStore/index.ts
+++ b/src/src/components/EventsStore/index.ts
@@ -13,6 +13,7 @@ import {
 import { CalendarsContext } from '../Contexts/CalendarsContext';
 import { ruleMatchers, useVirtualCalendars } from '../PowerTools/AutoComplete';
 import { usePref } from '../Preferences/usePref';
+import { AuthContext } from '../Contexts/AuthContext';
 
 export const summedDurations: unique symbol = Symbol('calendarTotal');
 
@@ -67,6 +68,7 @@ export function useEvents(
   }, [ignoreAllDayEvents]);
 
   const virtualCalendars = useVirtualCalendars();
+  const auth = React.useContext(AuthContext);
 
   const [durations] = useAsyncState(
     React.useCallback(async () => {
@@ -77,6 +79,7 @@ export function useEvents(
         endDate === undefined
       )
         return undefined;
+      await auth.handleAuthenticate(true);
       await Promise.all(
         calendars.map(async ({ id }) => {
           const daysBetween = getDatesBetween(startDate, endDate);
@@ -145,7 +148,14 @@ export function useEvents(
         })
       );
       return extractData(eventsStore.current, calendars, startDate, endDate);
-    }, [calendars, startDate, endDate, ignoreAllDayEvents, virtualCalendars]),
+    }, [
+      auth,
+      calendars,
+      startDate,
+      endDate,
+      ignoreAllDayEvents,
+      virtualCalendars,
+    ]),
     false
   );
   return durations;