diff --git a/.github/workflows/book-qa.yml b/.github/workflows/book-qa.yml
index 8419284..377a78b 100644
--- a/.github/workflows/book-qa.yml
+++ b/.github/workflows/book-qa.yml
@@ -23,7 +23,7 @@ jobs:
         uses: actions/checkout@v6
         with:
           repository: itdojp/book-formatter
-          ref: cff9fcf8bae31140f07b358d314fc64173cb7013
+          ref: c4dcd01e8450112f95002a454657d409cb3fa2f1
           path: book-formatter
 
       - name: Setup Node.js