diff --git a/js/lib/DateUtils.js b/js/lib/DateUtils.js
index ef332128572f..f9f9b57c8400 100644
--- a/js/lib/DateUtils.js
+++ b/js/lib/DateUtils.js
@@ -1,4 +1,4 @@
-/* globals moment */
+import moment from 'moment';
 import Str from './Str.js';
 
 // Non-Deprecated Methods
diff --git a/js/lib/Network.js b/js/lib/Network.js
index bbe048a6407a..fc3697765e1c 100644
--- a/js/lib/Network.js
+++ b/js/lib/Network.js
@@ -11,7 +11,8 @@ let isAppOffline = false;
  * @param {string} [type]
  * @returns {$.Deferred}
  */
-async function request(command, data, type) {
+async function request(command, data, type = 'post') {
+  console.debug(`Making "${command}" ${type} request`);
   const formData = new FormData();
   formData.append('authToken', await Store.get('session', 'authToken'));
   for (const property in data) {
@@ -21,7 +22,7 @@ async function request(command, data, type) {
     let response = await fetch(
       `https://expensify.com.dev/api?command=${command}`,
       {
-        method: 'post',
+        method: type,
         body: formData,
       },
     );
diff --git a/js/store/STOREKEYS.js b/js/store/STOREKEYS.js
index 705f26a1d8bd..ac06965f41f4 100644
--- a/js/store/STOREKEYS.js
+++ b/js/store/STOREKEYS.js
@@ -9,4 +9,5 @@ export default {
   ACTIVE_REPORT: 'active_report',
   REPORTS: 'reports',
   SESSION: 'session',
+  LAST_AUTHENTICATED: 'last_authenticated',
 };
diff --git a/js/store/actions/SessionActions.js b/js/store/actions/SessionActions.js
index 1f705226a21d..f45f213e3d29 100644
--- a/js/store/actions/SessionActions.js
+++ b/js/store/actions/SessionActions.js
@@ -3,6 +3,7 @@ import {request} from '../../lib/Network.js';
 import ROUTES from '../../ROUTES.js';
 import STOREKEYS from '../STOREKEYS.js';
 import * as PersistentStorage from '../../lib/PersistentStorage.js';
+import * as _ from 'lodash';
 
 // TODO: Figure out how to determine prod/dev on mobile, etc.
 const IS_IN_PRODUCTION = false;
@@ -11,6 +12,15 @@ const partnerPassword = IS_IN_PRODUCTION
   ? 'e21965746fd75f82bb66'
   : 'c3a9ac418ea3f152aae2';
 
+/**
+ * Amount of time (in ms) after which an authToken is considered expired.
+ * Currently set to 90min
+ *
+ * @private
+ * @type {Number}
+ */
+const AUTH_TOKEN_EXPIRATION_TIME = 1000 * 60;
+
 /**
  * Sign in with the API
  * @param {string} login
@@ -20,7 +30,6 @@ const partnerPassword = IS_IN_PRODUCTION
 function signIn(login, password, useExpensifyLogin = false) {
   Store.set(STOREKEYS.CREDENTIALS, {login, password});
   Store.set(STOREKEYS.SESSION, {});
-
   return request('Authenticate', {
     useExpensifyLogin: useExpensifyLogin,
     partnerName: partnerName,
@@ -37,8 +46,18 @@ function signIn(login, password, useExpensifyLogin = false) {
         return;
       }
 
+      // If we didn't get a 200 response from authenticate, the user needs to sign in again
+      if (data.jsonCode !== 200) {
+        console.warn(
+          'Did not get a 200 from authenticate, going back to sign in page',
+        );
+        Store.set(STOREKEYS.APP_REDIRECT_TO, ROUTES.SIGNIN);
+        return;
+      }
+
       Store.set(STOREKEYS.SESSION, data);
       Store.set(STOREKEYS.APP_REDIRECT_TO, ROUTES.HOME);
+      Store.set(STOREKEYS.LAST_AUTHENTICATED, new Date().getTime());
 
       return data;
     })
@@ -77,18 +96,27 @@ async function signOut() {
 /**
  * Make sure the authToken we have is OK to use
  */
-function verifyAuthToken() {
+async function verifyAuthToken() {
+  const lastAuthenticated = await Store.get(STOREKEYS.LAST_AUTHENTICATED);
+  const credentials = await Store.get(STOREKEYS.CREDENTIALS);
+  const haveCredentials = !_.isNull(credentials);
+  const haveExpiredAuthToken =
+    lastAuthenticated < new Date().getTime() - AUTH_TOKEN_EXPIRATION_TIME;
+
+  if (haveExpiredAuthToken && haveCredentials) {
+    console.debug('Invalid auth token: Token has expired.');
+    signIn(credentials.login, credentials.password);
+    return;
+  }
+
   request('Get', {returnValueList: 'account'}).then((data) => {
     if (data.jsonCode === 200) {
       console.debug('We have valid auth token');
       Store.set(STOREKEYS.SESSION, data);
       return;
-    } else if (data.jsonCode === 407) {
-      console.warn('We need to re-auth');
-      return;
     }
 
-    // If the auth token is bad, we want them to go to the sign in page
+    // If the auth token is bad and we didn't have credentials saved, we want them to go to the sign in page
     Store.set(STOREKEYS.APP_REDIRECT_TO, ROUTES.SIGNIN);
   });
 }
diff --git a/package-lock.json b/package-lock.json
index 973d10e555cd..8f19e279b73f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9666,6 +9666,11 @@
         "minimist": "^1.2.5"
       }
     },
+    "moment": {
+      "version": "2.27.0",
+      "resolved": "https://registry.npmjs.org/moment/-/moment-2.27.0.tgz",
+      "integrity": "sha512-al0MUK7cpIcglMv3YF13qSgdAIqxHTO7brRtaz3DlSULbqfazqkc5kEjNrLDOM7fsjshoFIihnU8snrP7zUvhQ=="
+    },
     "move-concurrently": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/move-concurrently/-/move-concurrently-1.0.1.tgz",
diff --git a/package.json b/package.json
index 5edd7088c104..602944600000 100644
--- a/package.json
+++ b/package.json
@@ -15,6 +15,7 @@
     "@react-native-community/async-storage": "^1.11.0",
     "jquery": "^3.5.1",
     "lodash": "^4.17.19",
+    "moment": "^2.27.0",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",
     "react-native": "0.63.2",