Hello Simo, Your timer does currently have the most up to date firmware version (23) for your particular hardware version. They must have just updated it while it was connected, because it cannot update unless it is connected to the internet. If you’ve changed your DNS settings i’d check and make sure the timer is within proper range of your router, or that your router doesn’t have any other settings inhibiting your timer to connect. You will also want to make sure that there is no exclamation mark next to the Wi-Fi symbol on your actual timer device. To get your timer to reconnect you could update your Wi-Fi settings, factory reset your timer, and unplug your ribbon cable for about 5 seconds. If you need any further assistance please just let us know.