diff --git a/.github/workflows/book.yml b/.github/workflows/book.yml
index 4fe343e..2b49828 100644
--- a/.github/workflows/book.yml
+++ b/.github/workflows/book.yml
@@ -19,7 +19,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
-      fetch-depth: 0
+      with:
+        fetch-depth: 0
 
     - uses: actions/setup-python@v4
       with: