diff --git a/.github/workflows/tests-cxx.yml b/.github/workflows/tests-cxx.yml
index a69fbb7..ab6c40e 100644
--- a/.github/workflows/tests-cxx.yml
+++ b/.github/workflows/tests-cxx.yml
@@ -6,7 +6,7 @@ jobs:
   cxx:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install libraries
       run: |
         sudo apt-get install libhdf5-serial-dev libboost-dev