# Telesky ST-Link V2 Upgrade Firmware

When prompt that device fails to enter DFU mode:

Eject ST-Link

<figure><img src="/files/g2Cx4Q8aD4UJFinTgpL5" alt=""><figcaption></figcaption></figure>

Unplug the device, leave the ST-Link upgrade window open

Re-plug the device

Click the "Open in update mode" button again

<figure><img src="/files/50rcC6NQG5Ho6XOJvC8L" alt=""><figcaption></figcaption></figure>


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