This is an overview of the latest Nuki Smart Lock Ultra public firmware release. You will always find the latest release on top.
Firmware 5.9.4
(06.08.2026)
- To ensure the long-term health of the battery in your Smart Lock Pro (5th Gen.) and Ultra, we have added a charge limit. By default, your device will charge up to 80 %. You can adjust this setting by tapping the Smart Lock’s “Settings“ → “Features & Configuration“ → “Battery“.
- Minor changes and improvements in the background ensure that the Smart Lock runs even more smoothly.
Firmware 5.8.10
(20.06.2026)
- Do you use a Keypad 2 NFC with your Smart Lock? We have enhanced the Tap to Unlock experience via the Smart Home Mode (Aliro).
- Adjustments to the motor performance ensure that your Smart Lock operates more smoothly in all speed modes.
- We improved the reliability and stability of the Smart Lock’s Bluetooth connection.
- Minor changes and improvements in the background ensure that the Smart Lock runs even more smoothly.
Firmware 5.7.8
(10.03.2026)
- Matter/Thread stability improvements
- Smart Lock Go motor optimizations
- Bug fixes and performance improvements
Firmware 5.6.10
(22.01.2026)
- Update to Matter 1.4.1
- Faster locking and unlocking via Bluetooth
- Improvements for “Open door”
- Bug fixes and performance improvements
Firmware 5.5.9/5.5.10
(24.09.2025)
- We have further improved the sound of your Smart Lock Pro and Ultra.
- When opening the door your latch will now be pulled even more reliably—especially with stiff doors.
- Minor changes and improvements in the background ensure that the Smart Lock runs even more smoothly.
Firmware 5.4.6
(02.07.2025)
- We improved the Smart Lock’s calibration so it operates more smoothly and is more effective on stiff doors.
- Minor changes and improvements in the background ensure that the Smart Lock runs even more smoothly.
Firmware 5.3.7
(29.04.2025)
- Enhanced stability with Matter 1.4 and improved Wi-Fi settings
- Bug fixes and performance improvements
Firmware 5.2.2
(06.03.2025)
- Overall, we enhanced the stability of the Smart Lock Ultra.
- We enhanced the reliability of Remote Access via Thread and the built-in Wi-Fi module.
- We also improved the strength and reliability of the Smart Lock’s opening function (pulling the latch). This ensures a proper operation.
- Minor changes and improvements in the background ensure that the Smart Lock runs even more smoothly.
Firmware 5.1.9
(19.02.2025)
- Overall, we enhanced the stability of the Smart Lock Ultra.
- We enhanced the reliability of Remote Access via Thread and the built-in Wi-Fi module.
- We also improved the strength and reliability of the Smart Lock’s opening function (pulling the latch). This ensures a proper operation.
- Minor changes and improvements in the background ensure that the Smart Lock runs even more smoothly.
Firmware 5.0.25/26
(19.12.2024)
- Discover the new Smart Lock Ultra – the fastest and smallest Smart Lock by Nuki.
- Simply turn your Smartphone into a key: by swiping or fully automatically with Auto Unlock
- Share access permissions with family and friends
- With Nuki Ultra you also benefit from brand new features such as:
- 3 locking speed modes from Gentle to Insane;
- Step-by-step installation with a guide in the app;
- A backup feature to transfer data from your current device to your Smart Lock Ultra