Heimdall v0.8.1 for all networks

Announcements
1

Hello everyone,

We have released heimdall v0.8.1 for both Polygon Mainnet and Amoy networks, which is the copy of v0.8.0 private release. It includes an important security fix requiring a hard fork (which happened already successfully on both networks).

The hard fork was scheduled to be activated on

  • Block 46361000 on Mainnet (2nd June 2026, 2 PM UTC)

  • Block 35914000 on Amoy (28th May 2026, 2 PM UTC)

Action required: All node operators running versions < v0.8.0 must upgrade as soon as possible to ensure compatibility and network safety.

Steps for upgrading Heimdall

  • Stop heimdalld service

sudo service heimdalld stop

  • Install heimdall with a version tag, network name, and node type (sentry or validator).

# Replace the network and node type
curl -L https://raw.githubusercontent.com/0xpolygon/install/heimdall-v2/heimdall-v2.sh | bash -s -- v0.8.1 <network> <node_type>
  • Check heimdall version (it should print 0.8.1 )

/usr/bin/heimdalld version

  • Restart heimdall service

sudo service heimdalld start

  • Restart the telemetry services

sudo service telemetry restart

What’s Changed

Full Changelog: v0.7.1…v0.8.1

Docker Images

You can find the latest docker images here.

Thank you for your cooperation.

Regards,

Polygon Labs