diff --git a/config/settings.yml b/config/settings.yml
index f80cf30..41a8770 100644
--- a/config/settings.yml
+++ b/config/settings.yml
@@ -23,7 +23,7 @@ chat_integration:
     default: 400
   chat_integration_slack_outbound_webhook_url:
     default: ''
-    regex: '^https:\/\/hooks\.slack\.com\/services\/.+$'
+    regex: '^https:\/\/hooks\.slack\.com\/(services|workflow)\/.+$'
   chat_integration_slack_icon_url:
     default: ''
   chat_integration_slack_transcript_quote: