diff --git a/packages/uhk-agent/src/package.json b/packages/uhk-agent/src/package.json
index 6d056351..f3fb067a 100644
--- a/packages/uhk-agent/src/package.json
+++ b/packages/uhk-agent/src/package.json
@@ -16,8 +16,8 @@
   "dependencies": {
     "node-hid": "0.5.7"
   },
-  "dataModelVersion": "1.0.0",
-  "usbProtocolVersion": "1.2.0",
-  "slaveProtocolVersion": "2.1.0",
-  "firmwareVersion": "3.0.0"
+  "firmwareVersion": "4.0.0",
+  "dataModelVersion": "3.0.0",
+  "usbProtocolVersion": "2.0.0",
+  "slaveProtocolVersion": "3.0.0"
 }
diff --git a/packages/uhk-agent/src/services/device.service.ts b/packages/uhk-agent/src/services/device.service.ts
index 5c54534a..cd551da6 100644
--- a/packages/uhk-agent/src/services/device.service.ts
+++ b/packages/uhk-agent/src/services/device.service.ts
@@ -144,7 +144,7 @@ export class DeviceService {
         try {
             this.stopPollTimer();
 
-            if (data) {
+            if (data && data.length > 0) {
                 firmwarePathData = await saveTmpFirmware(data);
                 await this.operations.updateRightFirmware(firmwarePathData.rightFirmwarePath);
                 await this.operations.updateLeftModule(firmwarePathData.leftFirmwarePath);
@@ -162,7 +162,9 @@ export class DeviceService {
             response.error = err;
         }
 
-        await emptyDir(firmwarePathData.tmpDirectory.name);
+        if (firmwarePathData) {
+            await emptyDir(firmwarePathData.tmpDirectory.name);
+        }
 
         await snooze(500);
         event.sender.send(IpcEvents.device.updateFirmwareReply, response);
diff --git a/packages/uhk-web/src/app/services/device-renderer.service.ts b/packages/uhk-web/src/app/services/device-renderer.service.ts
index d54692ad..ad1f3668 100644
--- a/packages/uhk-web/src/app/services/device-renderer.service.ts
+++ b/packages/uhk-web/src/app/services/device-renderer.service.ts
@@ -35,7 +35,11 @@ export class DeviceRendererService {
     }
 
     updateFirmware(data?: Array<number>): void {
-        this.ipcRenderer.send(IpcEvents.device.updateFirmware, JSON.stringify(data));
+        if (data) {
+            this.ipcRenderer.send(IpcEvents.device.updateFirmware, JSON.stringify(data));
+        } else {
+            this.ipcRenderer.send(IpcEvents.device.updateFirmware);
+        }
     }
 
     startConnectionPoller(): void {