diff --git a/.github/workflows/debian12_bookworm-codespace.yaml b/.github/workflows/debian12_bookworm-codespace.yaml
index 463b2d2..29c468d 100644
--- a/.github/workflows/debian12_bookworm-codespace.yaml
+++ b/.github/workflows/debian12_bookworm-codespace.yaml
@@ -14,6 +14,6 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Build Dockerfile-debian12_bookworm-codespace
         run: docker build -f Dockerfile-debian12_bookworm-codespace .
diff --git a/.github/workflows/debian13_trixie-codespace.yaml b/.github/workflows/debian13_trixie-codespace.yaml
index e426957..8fc76cc 100644
--- a/.github/workflows/debian13_trixie-codespace.yaml
+++ b/.github/workflows/debian13_trixie-codespace.yaml
@@ -14,6 +14,6 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Build Dockerfile-debian13_trixie-codespace
         run: docker build -f Dockerfile-debian13_trixie-codespace .
diff --git a/.github/workflows/nix-devcontainer-codespace.yaml b/.github/workflows/nix-devcontainer-codespace.yaml
index 3c514b8..136ea37 100644
--- a/.github/workflows/nix-devcontainer-codespace.yaml
+++ b/.github/workflows/nix-devcontainer-codespace.yaml
@@ -14,6 +14,6 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Build Dockerfile-nix-devcontainer-codespace
         run: docker build --build-arg GITHUB_TOKEN=${{ github.token }} -f Dockerfile-nix-devcontainer-codespace .