Update Overview.rst

Author: fladd

Overview.rst

@@ -139,12 +139,9 @@ Forum
 The new official Expyriment support forum can be found at http://forum.expyriment.org.
 
 
-Matrix/IRC channel
-------------------
-To ask questions or to have real-time discussions with other users and the developers you can also use our `Matrix chat <https://riot.im/app/#/room/#expyriment:matrix.org>`_. The room is also accessible from IRC::
-
-    Server: irc.freenode.org
-    Channel: #expyriment
+Matrix chat
+-----------
+To ask questions or to have real-time discussions with other users and the developers you can also use our `Matrix chat <https://matrix.to/#/#expyriment:matrix.org>`_.
 
 
 Social networks