diff --git a/action.yml b/action.yml
index cb09d63..4044b48 100644
--- a/action.yml
+++ b/action.yml
@@ -14,11 +14,11 @@ inputs:
     description: 'If set to true, will resolve any alert with the same pagerduty-dedup-key (if such an alert exists).'
     required: false  
   severity:
-    description: 'Notification severity label.'
+    description: 'Notification severity label. If omitted, alerts will be "critical".'
     required: false
 runs:
   using: 'node20'
   main: 'index.js'
 branding:
   icon: 'alert-triangle'
-  color: 'red'
\ No newline at end of file
+  color: 'red'