diff --git a/book.txt b/book.txt
index 543c4357..b7cb0423 100644
--- a/book.txt
+++ b/book.txt
@@ -57,4 +57,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v2
+        uses: actions/deploy-pages@v3