diff --git a/source/contact.md b/source/contact.md
index 23c9c6d..02fa605 100644
--- a/source/contact.md
+++ b/source/contact.md
@@ -3,7 +3,7 @@
 ---
 
 ## Slack
-- 未登録の方: [https://iojs-jp-slack.herokuapp.com](https://iojs-jp-slack.herokuapp.com)
+- 未登録の方: [jsconf.jp invite link](https://join.slack.com/t/jsconfjp/shared_invite/zt-1j7fqgvbq-Qa334TtwwKWC1eJBrgJ3yQ)
 - 登録済みの方: [https://iojs-jp.slack.com](https://iojs-jp.slack.com)
 
 ## IRC