diff --git a/action.yml b/action.yml
index 1e71b95..ee8012c 100644
--- a/action.yml
+++ b/action.yml
@@ -6,11 +6,20 @@ inputs:
     description: 'The GITHUB_TOKEN secret'
     required: true
   configuration-path:
-    description:  'Path to the labeler.yml configuration file'
+    description: 'Path to the labeler.yml configuration file'
     required: true
   enable-versioned-regex:
-    description:  'Controls if versioned regex templates are being used'
+    description: 'Controls if versioned regex templates are being used'
     required: true
+  versioned-regex:
+    description: 'The regex version number to use. Only required if using versioned regex files'
+    required: false
+  not-before:
+    description: 'Is optional and will result in any issues prior to this timestamp to be ignored'
+    required: false
+  body-missing-regex-label:
+    description: 'The name of the label that should be added to an issue where the specified `version-regex` can not be found.'
+    required: false
 runs:
   using: 'node12'
   main: 'lib/main.js'