Now install terminal emulator app, type command su and hit enter.
If a popup prompts for root access “allow” it
Now type sh sdcard/mrw/root.sh and hit Enter
You’ll see few error commands and at last SuperSU app will open on its own.
You need to update SU binary to complete the installation. Select “Continue to update SU binary as visible in the first picture above.
In next step, it’ll ask to choose recovery for the binary update. Make sure you click on “NORMAL” or else your phone may get stuck in a boot loop as you’ve stock recovery. Once the installation gets completed you’ll get a confirmation in the form of “Installation Sucess” Phone needs to be rebooted. Click on Reboot option.
When the phone will turn back on, kingroot will be gone and SuperSU will take its place as rooting app. You can update it to the latest version via PlayStore.
There is one paid app called Super-Sume in Play Store which does the same job of replacing kingroot with SuperSU. I haven’t tried it yet as the above free solution worked for me. If you’ve tried and it worked for you do let us know.
If you’re stuck at some point or facing any issue feel free to share it via the comment section below.