diff --git a/action.yml b/action.yml
index f0f3b95..9af486e 100644
--- a/action.yml
+++ b/action.yml
@@ -100,6 +100,7 @@ inputs:
     default: ""
   _internal-strict-mode:
     description: Whether to fail when any errors are thrown. Used only to test the Action; do not set this in your own workflows.
+    required: false
     default: false
 outputs:
   pull-request-number: