diff --git a/docs/30_Usage.md b/docs/30_Usage.md
index 8b4a142d050c4f72df5d5473d0f5c9bdea867521..efccbe3bed6f3b6aa856047bc8b9a7a16d31e623 100644
--- a/docs/30_Usage.md
+++ b/docs/30_Usage.md
@@ -74,9 +74,7 @@ tags[]="monitoring"
 email[]="support@example.com"
 email[]="webmaster@example.com"
 
-; for slack use the following format
-; <channelname> + comma + <webhook url>
-slack[]='{ "#support-channel": "https://hooks.slack.com/services/XXXXXX/YYYYYY/ZZZZZ" }'
+slack["#support-channel"]="https://hooks.slack.com/services/XXXXXX/YYYYYY/ZZZZZ"
 
 
 ; -----------------------------------------------------------------------