diff --git a/.github/workflows/java.yml b/.github/workflows/java.yml
index 5bf09732e..48fc8795a 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-24.04
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
       - name: Set up JDK 1.17
         uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165
         with:
@@ -29,7 +29,7 @@ jobs:
     name: Lint Java files using Checkstyle
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
       - name: Set up JDK 1.17
         uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165
         with:
@@ -43,7 +43,7 @@ jobs:
     name: Test all exercises using java-test-runner
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
       - 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 cb23011e0..81e5bbe77 100644
--- a/.github/workflows/markdown.yml
+++ b/.github/workflows/markdown.yml
@@ -17,6 +17,6 @@ jobs:
     name: Lint Markdown files
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
       - name: Lint markdown
         uses: DavidAnson/markdownlint-cli2-action@992badcdf24e3b8eb7e87ff9287fe931bcb00c6e