Fix Slack's URL info
@@ -41,5 +41,6 @@ Developers welcome!
* Our developer mailing list:
http://lists.runtime.co/mailman/listinfo/dev-mcuboot_lists.runtime.co
-* Our Slack channel: https://runtimeco.slack.com/
+* Our Slack channel: https://mcuboot.slack.com/ <br />
+ Get your invite [here!](https://join.slack.com/t/mcuboot/shared_invite/MjE2NDcwMTQ2MTYyLTE1MDA4MTIzNTAtYzgyZTU0NjFkMg)
* Our IRC channel: http://irc.freenode.net, #mcuboot
