diff --git a/blog/linux-on-macbook-pro-2016.mdwn b/blog/linux-on-macbook-pro-2016.mdwn
index 0ac96a22..7e19cfd6 100644
--- a/blog/linux-on-macbook-pro-2016.mdwn
+++ b/blog/linux-on-macbook-pro-2016.mdwn
@@ -21,7 +21,7 @@ checkout this site again in a couple of days!
 ## Meanwhile ...
 
 If you want to discuss about Linux and Apple or other FOSS topics, you
-are invited to [join the chat of ungleich](https://chat.ungleich.ch/),
+are invited to [join the chat of ungleich](https://chat.with.ungleich.ch/),
 the Linux / Unix / FOSS company that I am working for. We have pretty
 strong opinions on some topics (not mentioning systemd here) and you
 are invited to challenge them :-)
diff --git a/blog/my-notebook-firewall-36c3.mdwn b/blog/my-notebook-firewall-36c3.mdwn
index 3f8dc8d3..7ec5fe07 100644
--- a/blog/my-notebook-firewall-36c3.mdwn
+++ b/blog/my-notebook-firewall-36c3.mdwn
@@ -159,7 +159,7 @@ useless, as any command and control server can be reached on port 80
 and you probably don't want to block outgoing port 80 traffic.
 
 If you have any comments about it, I'm interested in hearing your
-feedback on [the ungleich chat](http://chat.ungleich.ch),
+feedback on [the ungleich chat](http://chat.with.ungleich.ch),
 [twitter](https://twitter.com/NicoSchottelius) or IRC (telmich).
 
 ## Update 2019-12-24
diff --git a/software/ctt.mdwn b/software/ctt.mdwn
index 66760d26..be993cd0 100644
--- a/software/ctt.mdwn
+++ b/software/ctt.mdwn
@@ -52,8 +52,8 @@ Get ctt via git:
 
 ## Support
 
-You can find us in the foss development channel
-[chat.ungleich.ch](https://chat.ungleich.ch/ungleich/channels/foss).
+You can find us on matrix, we
+[chat.with.ungleich.ch](https://chat.with.ungleich.ch).
 
 Issues can be opened on https://code.ungleich.ch/ungleich-public/ctt.