diff --git a/.github/workflows/dependabot-lockfile.yml b/.github/workflows/dependabot-lockfile.yml
index ea9fb4e..4c948de 100644
--- a/.github/workflows/dependabot-lockfile.yml
+++ b/.github/workflows/dependabot-lockfile.yml
@@ -33,7 +33,7 @@ jobs:
     if: github.actor == 'dependabot[bot]'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           ref: ${{ github.event.pull_request.head.ref }}
           repository: ${{ github.event.pull_request.head.repo.full_name }}
diff --git a/.github/workflows/deps-audit.yml b/.github/workflows/deps-audit.yml
index 6b5520a..008ed86 100644
--- a/.github/workflows/deps-audit.yml
+++ b/.github/workflows/deps-audit.yml
@@ -30,7 +30,7 @@ jobs:
     # fix doesn't redden `main`. PR/push runs still block so we notice drift.
     continue-on-error: ${{ github.event_name == 'schedule' }}
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
diff --git a/.github/workflows/links.yml b/.github/workflows/links.yml
index 689a82f..94ea3e7 100644
--- a/.github/workflows/links.yml
+++ b/.github/workflows/links.yml
@@ -27,7 +27,7 @@ jobs:
   lychee:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Run lychee
         uses: lycheeverse/lychee-action@8646ba30535128ac92d33dfc9133794bfdd9b411 # v2.8.0
diff --git a/.github/workflows/notebook-ci.yml b/.github/workflows/notebook-ci.yml
index 8501fe4..da919cb 100644
--- a/.github/workflows/notebook-ci.yml
+++ b/.github/workflows/notebook-ci.yml
@@ -23,7 +23,7 @@ jobs:
       matrix:
         python-version: ["3.11", "3.12"]
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
diff --git a/.github/workflows/notebook-hygiene.yml b/.github/workflows/notebook-hygiene.yml
index 91eeea2..782b93d 100644
--- a/.github/workflows/notebook-hygiene.yml
+++ b/.github/workflows/notebook-hygiene.yml
@@ -17,7 +17,7 @@ jobs:
   hygiene:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Set up Python
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
diff --git a/.github/workflows/secret-scan.yml b/.github/workflows/secret-scan.yml
index 1cb2ec3..de4e4e6 100644
--- a/.github/workflows/secret-scan.yml
+++ b/.github/workflows/secret-scan.yml
@@ -19,7 +19,7 @@ jobs:
   gitleaks:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index bc93639..8204599 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -19,7 +19,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
@@ -65,7 +65,7 @@ jobs:
       matrix:
         python-version: ["3.11", "3.12"]
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with: