diff --git a/packages/usb/get-left-firmware-version.js b/packages/usb/get-left-firmware-version.js
index 000094af..64d5436d 100755
--- a/packages/usb/get-left-firmware-version.js
+++ b/packages/usb/get-left-firmware-version.js
@@ -2,14 +2,14 @@
 const uhk = require('./uhk');
 
 const device = uhk.getUhkDevice();
-const sendData = new Buffer([uhk.usbCommands.getModuleProperty, uhk.modulePropertyIds.protocolVersions]);
+const sendData = new Buffer([uhk.usbCommands.getModuleProperty, uhk.moduleSlotToId.leftHalf, uhk.modulePropertyIds.protocolVersions]);
 console.log(sendData)
 device.write(uhk.getTransferData(sendData));
 const response = Buffer.from(device.readSync());
 console.log(response)
-const firmwareMajorVersion = response[7] + (response[8]<<8);
-const firmwareMinorVersion = response[9] + (response[10]<<8);
-const firmwarePatchVersion = response[11] + (response[12]<<8);
+const firmwareMajorVersion = uhk.getUint16(response, 8);
+const firmwareMinorVersion = uhk.getUint16(response, 10);
+const firmwarePatchVersion = uhk.getUint16(response, 12);
 
 console.log(`firmwareMajorVersion: ${firmwareMajorVersion}`);
 console.log(`firmwareMinorVersion: ${firmwareMinorVersion}`);