diff --git a/dist/index.cjs.js b/dist/index.cjs.js
index 08f1234..85953c5 100644
--- a/dist/index.cjs.js
+++ b/dist/index.cjs.js
@@ -199,9 +199,9 @@ class Updater {
         // send a packet
         // check for error
         // write file length
-        return new Promise((resolve, reject) => {
+        return new Promise(async (resolve, reject) => {
             // set mtu
-            this.bleObject.requestMtu(this.bleDeviceId, this._packetSize, (mtu) => { this._packetSize = mtu; }, () => { });
+            this._packetSize = await this.bleObject.withPromises.requestMtu(this.bleDeviceId, this._packetSize);
             // start notify
             this.bleObject.startNotification(this.bleDeviceId, this._updaterServiceUUID, this._updaterCommandCharacterisitcUUID, (rawData) => {
                 let dataView = new Uint8Array(rawData);
diff --git a/dist/index.es.js b/dist/index.es.js
index fadb034..8f525ba 100644
--- a/dist/index.es.js
+++ b/dist/index.es.js
@@ -197,9 +197,9 @@ class Updater {
         // send a packet
         // check for error
         // write file length
-        return new Promise((resolve, reject) => {
+        return new Promise(async (resolve, reject) => {
             // set mtu
-            this.bleObject.requestMtu(this.bleDeviceId, this._packetSize, (mtu) => { this._packetSize = mtu; }, () => { });
+            this._packetSize = await this.bleObject.withPromises.requestMtu(this.bleDeviceId, this._packetSize);
             // start notify
             this.bleObject.startNotification(this.bleDeviceId, this._updaterServiceUUID, this._updaterCommandCharacterisitcUUID, (rawData) => {
                 let dataView = new Uint8Array(rawData);
diff --git a/package.json b/package.json
index 27a6781..dbb9158 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "updaterweblibrary",
-  "version": "1.0.26",
+  "version": "1.0.27",
   "description": "OTA Updater App frontend library",
   "repository": {
     "type": "git",