diff --git a/.env.example b/.env.example
index fe3a597..0689964 100644
--- a/.env.example
+++ b/.env.example
@@ -60,3 +60,8 @@ GOOGLE_CLIENT_SECRET=
 GOOGLE_REDIRECT=http://localhost/login/google/end
 GOOGLE_CALENDAR_ID=
 LOCAL_EMAIL_FOR_LOGIN_VIA_GOOGLE=
+
+SLACK_URL=https://slack.com/api
+SLACK_CLIENT_TOKEN=
+SLACK_SIGNING_SECRET=
+SLACK_DEFAULT_CHANNEL="#general"