diff --git a/.github/workflows/deploy-book.yaml b/.github/workflows/deploy-book.yaml
index 71bf1f8..25d4149 100644
--- a/.github/workflows/deploy-book.yaml
+++ b/.github/workflows/deploy-book.yaml
@@ -6,7 +6,7 @@ on:
       artifact_name:
         description: 'Name of the artifact (zipped book) created by previous build step'
         required: false
-        default: book.zip
+        default: book-zip
         type: string
       destination_dir:
         description: 'Path to publish to on GitHub Pages, relative to site root. We use this to deploy previews in a subdirectory.'
@@ -16,7 +16,7 @@ on:
       is_preview:
         description: 'Are we deploying a preview?'
         required: false
-        default: 'false'
+        default: 'true'
         type: string
       cname:
         description: 'Custom domain name'