Disclaimer: Firmware updates carry inherent risk. Always follow official D-Link support documentation. If your router is under warranty, contact D-Link support for guided assistance.
D-Link has removed firmware files from many general download sites to push users to official support portals. Here is the safe way to get the file: D-link Dwr-m920 Firmware Update
Inconsistent vendor response times for certain product lines. How to Update Firmware Disclaimer: Firmware updates carry inherent risk
Pro Tip: Check the release notes (Readme.txt) to see what issues the new firmware fixes. If you are not experiencing those issues, you may wait, but security updates should never be skipped. you may wait