diff --git a/data/cities/de/leipzig.md b/data/cities/de/leipzig.md
index 6568559..fc9d9be 100644
--- a/data/cities/de/leipzig.md
+++ b/data/cities/de/leipzig.md
@@ -42,4 +42,4 @@ Um mehr zu Erfahren, schaue auf unseren [Github Seite](http://github.com/opentec
 
 ## Kontakt
 
-Hast du noch Fragen, dann sende uns eine [E-Mail](mailto:leipzig@opentechschool.org) or melde dich in unserem [Slack](https://opentechschool-slack.herokuapp.com) (channel: #leipzig).
+Hast du noch Fragen, dann sende uns eine [E-Mail](mailto:leipzig@opentechschool.org) or melde dich in unserem [Slack](https://join.slack.com/t/opentechschool/shared_invite/zt-1mpx31hk2-C0~bk3sXUhzyT57f8J4Smg) (channel: #leipzig).
diff --git a/data/cities/en/leipzig.md b/data/cities/en/leipzig.md
index 673d078..ac74980 100644
--- a/data/cities/en/leipzig.md
+++ b/data/cities/en/leipzig.md
@@ -44,4 +44,4 @@ We have a bunch ongoing projects and are always looking for people who like to c
 
 ## Contact
 
-You can send us an [email](mailto:leipzig@opentechschool.org) or join us at [Slack](https://opentechschool-slack.herokuapp.com) (channel: #leipzig).
+You can send us an [email](mailto:leipzig@opentechschool.org) or join us at [Slack](https://join.slack.com/t/opentechschool/shared_invite/zt-1mpx31hk2-C0~bk3sXUhzyT57f8J4Smg) (channel: #leipzig).