diff --git a/.github/workflows/book.yml b/.github/workflows/book.yml
index c2755c3..62c73c2 100644
--- a/.github/workflows/book.yml
+++ b/.github/workflows/book.yml
@@ -12,13 +12,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install mdBook
         run: |
-          wget 'https://github.com/rust-lang/mdBook/releases/download/v0.4.30/mdbook-v0.4.30-x86_64-unknown-linux-gnu.tar.gz' --output-document 'mdbook.tar.gz'
+          wget 'https://github.com/rust-lang/mdBook/releases/download/v0.4.42/mdbook-v0.4.42-x86_64-unknown-linux-gnu.tar.gz' --output-document 'mdbook.tar.gz'
           tar -zxvf mdbook.tar.gz
-          ls
 
       - name: Build Book
         run: ./mdbook build