diff --git a/.github/workflows/doc-test.yml b/.github/workflows/doc-test.yml
index 6695aae..cf5c6fa 100644
--- a/.github/workflows/doc-test.yml
+++ b/.github/workflows/doc-test.yml
@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
       - run: docker pull exercism/factor-test-runner
       - name: Verify introduction.md examples
         run: python3 bin/test-doc-examples
diff --git a/.github/workflows/learning-checks.yml b/.github/workflows/learning-checks.yml
index 44a572a..c98d878 100644
--- a/.github/workflows/learning-checks.yml
+++ b/.github/workflows/learning-checks.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
       - name: Run bin/prereq-check
         run: bin/prereq-check
 
@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
       - name: Generate .meta/known-words.md
         run: bin/extract-known-words
       - name: Detect unknown words in exemplars and examples
diff --git a/.github/workflows/links.yml b/.github/workflows/links.yml
index fa7493b..e44495c 100644
--- a/.github/workflows/links.yml
+++ b/.github/workflows/links.yml
@@ -12,7 +12,7 @@ jobs:
   linkChecker:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
 
       - name: Link Checker
         uses: lycheeverse/lychee-action@8646ba30535128ac92d33dfc9133794bfdd9b411
diff --git a/.github/workflows/shellcheck.yml b/.github/workflows/shellcheck.yml
index 5ec4a38..facd692 100644
--- a/.github/workflows/shellcheck.yml
+++ b/.github/workflows/shellcheck.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
 
       - name: Run shellcheck
         uses: ludeeus/action-shellcheck@00cae500b08a931fb5698e11e79bfbd38e612a38
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index de337b3..b292581 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
       - name: Check every exercise has the current exercism-tools vocab
         run: bin/redeploy-exercism-tools
       - run: docker pull exercism/factor-test-runner