diff --git a/.github/workflows/build-corsika7.yml b/.github/workflows/build-corsika7.yml
index 5161f7d964..130cc27af7 100644
--- a/.github/workflows/build-corsika7.yml
+++ b/.github/workflows/build-corsika7.yml
@@ -54,7 +54,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Download auxiliary files
         uses: actions/download-artifact@v6
diff --git a/.github/workflows/build-sim_telarray.yml b/.github/workflows/build-sim_telarray.yml
index a0f4c2f62b..bdd7596bdb 100644
--- a/.github/workflows/build-sim_telarray.yml
+++ b/.github/workflows/build-sim_telarray.yml
@@ -36,7 +36,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3