diff --git a/.github/workflows/java.yml b/.github/workflows/java.yml
index 70079a548..07a61ef91 100644
--- a/.github/workflows/java.yml
+++ b/.github/workflows/java.yml
@@ -15,7 +15,7 @@ jobs:
     name: Check if tests compile cleanly with starter sources
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@1d96c772d19495a3b5c517cd2bc0cb401ea0529f
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b
       - name: Set up JDK 1.17
         uses: actions/setup-java@99b8673ff64fbf99d8d325f52d9a5bdedb8483e9
         with:
@@ -29,7 +29,7 @@ jobs:
     name: Lint Java files using Checkstyle
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@1d96c772d19495a3b5c517cd2bc0cb401ea0529f
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b
       - name: Set up JDK 1.17
         uses: actions/setup-java@99b8673ff64fbf99d8d325f52d9a5bdedb8483e9
         with:
@@ -43,7 +43,7 @@ jobs:
     name: Test all exercises using java-test-runner
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@1d96c772d19495a3b5c517cd2bc0cb401ea0529f
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b
       - name: Test all exercises using java-test-runner
         run: bin/test-with-test-runner
       - name: Archive test results
diff --git a/.github/workflows/markdown.yml b/.github/workflows/markdown.yml
index 3ae70bdd1..62a1e6541 100644
--- a/.github/workflows/markdown.yml
+++ b/.github/workflows/markdown.yml
@@ -17,6 +17,6 @@ jobs:
     name: Lint Markdown files
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@1d96c772d19495a3b5c517cd2bc0cb401ea0529f
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b
       - name: Lint markdown
         uses: DavidAnson/markdownlint-cli2-action@b4c9feab76d8025d1e83c653fa3990936df0e6c8