diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index ae7b9b1f..fdf3c0ff 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -13,14 +13,14 @@ jobs:
   license:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@v4.0.0
       - name: Check License Lines
         uses: kt3k/license_checker@v1.0.6
   dco-check:
     runs-on: ubuntu-latest
     if: github.event_name == 'pull_request'
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@v4.0.0
         with:
           fetch-depth: 0
       - name: Setup Python
diff --git a/.github/workflows/flake-update.yml b/.github/workflows/flake-update.yml
index 96c1b354..914c505c 100644
--- a/.github/workflows/flake-update.yml
+++ b/.github/workflows/flake-update.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3.6.0
+        uses: actions/checkout@v4.0.0
       - name: Install Nix
         uses: cachix/install-nix-action@v23
         with: