Samsung Galaxy C9 Pro rolling out with a new firmware update. The update includes security patch for the month of March and comes with build number C900FDDU1AQC32. Along with security patch update also brings some bug fixes and performance enhancements.
It's an over-the-air update, so will take time to reach every unit. Meanwhile you can head over to your device setting's menu and manually check whether the update is available for your device or not.