diff --git a/.github/workflows/build-pdf.yml b/.github/workflows/build-pdf.yml
index b7be4dd..cc3069e 100644
--- a/.github/workflows/build-pdf.yml
+++ b/.github/workflows/build-pdf.yml
@@ -35,7 +35,7 @@ jobs:
     steps:
     # Step 1: Checkout the repository
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         submodules: 'recursive'