diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 25dfd12..1b9fb1d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
       matrix:
         python-version: ["3.8", "3.11", "3.13"]
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v7.0.1
       - uses: actions/setup-python@v7
         with:
           python-version: ${{ matrix.python-version }}
diff --git a/.github/workflows/credit-contributor.yml b/.github/workflows/credit-contributor.yml
index 11a1221..88f469d 100644
--- a/.github/workflows/credit-contributor.yml
+++ b/.github/workflows/credit-contributor.yml
@@ -37,7 +37,7 @@ jobs:
       pull-requests: write
     steps:
       - name: Check out the default branch
-        uses: actions/checkout@v7
+        uses: actions/checkout@v7.0.1
         with:
           ref: main
           fetch-depth: 0
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index b551d47..16be166 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -24,7 +24,7 @@ jobs:
     # an OIDC publish of a mismatched version is unrecoverable (#95).
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
       - name: Version parity (tag == pyproject == __version__ == CITATION == CHANGELOG)
         run: |
           tag="${GITHUB_REF_NAME#v}"
@@ -46,7 +46,7 @@ jobs:
     needs: verify
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
       - uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97  # v6
         with:
           python-version: "3.13"