diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index f36c7ea..369335f 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -24,9 +24,9 @@ jobs:
           - '3.13'
     runs-on: ${{ matrix.os || 'ubuntu-latest' }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@39cd14951b08e74b54015e9e001cdefcf80e669f # v5.1.1
         with:
           python-version: ${{ matrix.python-version }}
           allow-prereleases: true
@@ -53,9 +53,9 @@ jobs:
             os: ubuntu-20.04
     runs-on: ${{ matrix.os || 'ubuntu-latest' }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@39cd14951b08e74b54015e9e001cdefcf80e669f # v5.1.1
       with:
         python-version: ${{ matrix.python-version }}
         allow-prereleases: true
diff --git a/.github/workflows/scorecard.yml b/.github/workflows/scorecard.yml
index 844352e..9e1eda7 100644
--- a/.github/workflows/scorecard.yml
+++ b/.github/workflows/scorecard.yml
@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
         with:
           persist-credentials: false