diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index f2cb020..198a5c1 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout current branch (full)
-        uses: actions/checkout@v5
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - uses: coursier/cache-action@v6
         with:
           extraKey: ${{ runner.os }}
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index ecb206b..b4a49af 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout current branch (full)
-        uses: actions/checkout@v5
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - uses: coursier/cache-action@v6
         with:
           extraKey: ${{ runner.os }}
diff --git a/.github/workflows/zizmor.yml b/.github/workflows/zizmor.yml
index fb084ca..a11f0b0 100644
--- a/.github/workflows/zizmor.yml
+++ b/.github/workflows/zizmor.yml
@@ -18,7 +18,7 @@ jobs:
       actions: read # only needed for private repos
     steps:
       - name: Checkout repository
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           persist-credentials: false