diff --git a/App/ios/Libraries/RFID/Chainway/RFIDBluetoothManager.m b/App/ios/Libraries/RFID/Chainway/RFIDBluetoothManager.m
index 42314ee1..afc758c4 100644
--- a/App/ios/Libraries/RFID/Chainway/RFIDBluetoothManager.m
+++ b/App/ios/Libraries/RFID/Chainway/RFIDBluetoothManager.m
@@ -2153,7 +2153,7 @@ - (NSMutableArray *)peripheralArray {
 
 - (CBCharacteristic *)myCharacteristic {
   if (_myCharacteristic == nil) {
-    _myCharacteristic = [CBCharacteristic new];
+    _myCharacteristic = [CBCharacteristic alloc];
   }
   return _myCharacteristic;
 }