diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 07e31aa..7e0430e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,12 +14,12 @@ jobs:
           - watchOS
           - tvOS
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v6.0.2
     - run: sudo xcode-select --switch /Applications/Xcode_16.4.app
     - run: xcodebuild -scheme MarkdownView -destination 'generic/platform=${{ matrix.os }}' build
   lint:
     runs-on: ubuntu-24.04-arm
     container: swift:latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.2
       - run: swift format lint -r -p -s .
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index a621a8d..993dbd1 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,7 +12,7 @@ jobs:
   release:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.2
       - run: gh release create ${{ github.ref_name }} --generate-notes
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}