diff --git a/README.md b/README.md
index 530176c4..c1e6f8f4 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ General Public License Version 2; you choose, see [LICENSE.md](LICENSE.md).
 Clixon has a master branch continuously tested with CI, but releases are made ca every second month. Latest 6.0.0 release is from November 2022. Next is planned for January 2023. See [CHANGELOG.md](CHANGELOG.md) release history.
 
 Clixon interaction is best done posting issues, pull requests, or joining the
-[slack channel](https://clixondev.slack.com).
-[Slack invite](https://join.slack.com/t/clixondev/shared_invite/zt-1kl2nxe91-9vdsyYNjhU3ZP57nZq_2rw)(updated 29/11 2022, valid 30d)
+Matrix channels: https://matrix.to/#/#clixondev:matrix.org for general info and discussion, and
+https://matrix.to/#/#clixontech:matrix.org for technical details and issues.
 
 Clixon is sponsored by [Rubicon Communications LLC(Netgate)](https://www.netgate.com/) and [Akamai Technologies, Inc.](https://www.akamai.com).