diff --git a/.github/workflows/github_pages.yml b/.github/workflows/github_pages.yml
index 8712e07..f883519 100644
--- a/.github/workflows/github_pages.yml
+++ b/.github/workflows/github_pages.yml
@@ -20,7 +20,7 @@ jobs:
           mdbook-version: 'latest'
 
       - run: mdbook build
-        working-directory: ./book
+        working-directory: book
 
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v3