diff --git a/example.js b/example.js
index 3334e5b..f601b26 100644
--- a/example.js
+++ b/example.js
@@ -470,6 +470,10 @@ client.on('message', async msg => {
         console.log(statuses);
         const chat = await statuses[0]?.getChat(); // Get user chat of a first status
         console.log(chat);
+    } else if (msg.body === '!changeSync') {
+        // NOTE: this action will take effect after you restart the client.
+        const backgroundSync = await client.setBackgroundSync(true);
+        console.log(backgroundSync);
     }
 });
 
diff --git a/index.d.ts b/index.d.ts
index a6c3250..a26e4dc 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -180,6 +180,13 @@ declare namespace WAWebJS {
          */
         setAutoDownloadVideos(flag: boolean): Promise<void>
 
+        /**
+         * Changing the background synchronization setting.
+         * NOTE: this action will take effect after you restart the client.
+         * @param flag true/false on or off
+         */
+        setBackgroundSync(flag: boolean): Promise<void>
+
         /**
          * Get user device count by ID
          * Each WaWeb Connection counts as one device, and the phone (if exists) counts as one
diff --git a/src/Client.js b/src/Client.js
index 70a1418..6779723 100644
--- a/src/Client.js
+++ b/src/Client.js
@@ -1721,6 +1721,23 @@ class Client extends EventEmitter {
         }, flag);
     }
 
+    /**
+     * Setting background synchronization.
+     * NOTE: this action will take effect after you restart the client.
+     * @param {boolean} flag true/false
+     * @returns {Promise<boolean>}
+     */
+    async setBackgroundSync(flag) {
+        return await this.pupPage.evaluate(async flag => {
+            const backSync = window.Store.Settings.getGlobalOfflineNotifications();
+            if (backSync === flag) {
+                return flag;
+            }
+            await window.Store.Settings.setGlobalOfflineNotifications(flag);
+            return flag;
+        }, flag);
+    }
+    
     /**
      * Get user device count by ID
      * Each WaWeb Connection counts as one device, and the phone (if exists) counts as one
diff --git a/src/util/Injected/Store.js b/src/util/Injected/Store.js
index 3aae7b2..d9ef224 100644
--- a/src/util/Injected/Store.js
+++ b/src/util/Injected/Store.js
@@ -93,14 +93,17 @@ exports.ExposeStore = () => {
     window.Store.pinUnpinMsg = window.require('WAWebSendPinMessageAction').sendPinInChatMsg;
     window.Store.QueryExist = window.require('WAWebQueryExistsJob').queryWidExists;
     window.Store.ReplyUtils = window.require('WAWebMsgReply');
-    window.Store.Settings = window.require('WAWebUserPrefsGeneral');
     window.Store.BotSecret = window.require('WAWebBotMessageSecret');
     window.Store.BotProfiles = window.require('WAWebBotProfileCollection');
     window.Store.DeviceList = window.require('WAWebApiDeviceList');
     window.Store.HistorySync = window.require('WAWebSendNonMessageDataRequest');
-    if (window.compareWwebVersions(window.Debug.VERSION, '>=', '2.3000.1014111620')) 
+    if (window.compareWwebVersions(window.Debug.VERSION, '>=', '2.3000.1014111620'))
         window.Store.AddonReactionTable = window.require('WAWebAddonReactionTableMode').reactionTableMode;
     
+    window.Store.Settings = {
+        ...window.require('WAWebUserPrefsGeneral'),
+        ...window.require('WAWebUserPrefsNotifications')
+    };
     window.Store.NumberInfo = {
         ...window.require('WAPhoneUtils'),
         ...window.require('WAPhoneFindCC')
@@ -109,7 +112,6 @@ exports.ExposeStore = () => {
     window.Store.ForwardUtils = {
         ...window.require('WAWebForwardMessagesToChat')
     };
-
     window.Store.StickerTools = {
         ...window.require('WAWebImageUtils'),
         ...window.require('WAWebAddWebpMetadata')