Razer Huntsman Firmware Updater | RZ03-02520, RZ03-02521

Updated: 19-Sep-2025 | Answer ID: 1662
This answer shows the latest version of the Razer Huntsman Firmware update and how to install it successfully to your system.

Applicable Models

Firmware v1.02.00_r1

  • https://rzr.to/oejPc | March 1, 2019
  • Fixed random ghost/phantom key-presses – random key presses will register in Windows without actually pressing any keys.
  • Note: this can only be released to the following Huntsman versions:
    • Huntsman Quartz - RZ03-02521800
    • Huntsman Mercury - RZ03-02521900

Step-by-step Process

  1. Download the latest firmware update by downloading the link found above.
  2. Close Razer Synapse and all other running applications before proceeding with the update.
  3. Run the downloaded firmware (The installer will prompt you to close Synapse and all other applications, if you have already done so, left click "OK" to proceed).

Pop-up window on the updater screen prompting to close synapse

  1. Connect the Huntsman and click Update.

Connect device to PC on-screen instruction on the updater

  1. Wait for the update to complete.

Updater window showing the progress of the update process

  1. Once the firmware has been successfully applied, left-click "Close" to exit the installer.

Updater window showing the completion of the update process

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