diff --git a/.github/workflows/base.yml b/.github/workflows/base.yml
index af523be..0b028fe 100644
--- a/.github/workflows/base.yml
+++ b/.github/workflows/base.yml
@@ -35,7 +35,7 @@ jobs:
     name: Quickcheck (${{ matrix.target.name }}, ACVP ${{ matrix.acvp-version }})
     runs-on: ${{ matrix.target.runner }}
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
       - name: Run ACVP test
         run: |
           make
@@ -60,7 +60,7 @@ jobs:
     name: Quickcheck C90 (${{ matrix.target.name }})
     runs-on: ${{ matrix.target.runner }}
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
         with:
           submodules: true
       - name: make quickcheck
diff --git a/.github/workflows/cbmc.yml b/.github/workflows/cbmc.yml
index 6131cbe..c0c7d87 100644
--- a/.github/workflows/cbmc.yml
+++ b/.github/workflows/cbmc.yml
@@ -14,7 +14,7 @@ jobs:
     name: CBMC
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
       - uses: ./.github/actions/cbmc
         with:
           gh_token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cf518de..deba7be 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -79,7 +79,7 @@ jobs:
             compiler: { darwin: False }
     runs-on: ${{ matrix.target.runner }}
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
       - name: build+functest (default)
         uses: ./.github/actions/multi-functest
         with:
diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index 762aa6b..175fd33 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -19,7 +19,7 @@ jobs:
     outputs:
       run_needed: ${{ steps.check_run.outputs.run_needed }}
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
         if: github.event_name != 'workflow_dispatch'
         with:
           fetch-depth: 0
@@ -60,7 +60,7 @@ jobs:
     name: build nix cache (${{ matrix.runner }})
     runs-on: ${{ matrix.runner }}
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
       - uses: ./.github/actions/setup-nix
         with:
           cache: true