diff --git a/.github/workflows/javascript-tests.yml b/.github/workflows/javascript-tests.yml
index 05441474..ba24db5c 100644
--- a/.github/workflows/javascript-tests.yml
+++ b/.github/workflows/javascript-tests.yml
@@ -17,10 +17,10 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Set up Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: ${{ matrix.node-version }}
           cache: "npm"
diff --git a/.github/workflows/pypi-publish.yml b/.github/workflows/pypi-publish.yml
index 2609f8d2..24536755 100644
--- a/.github/workflows/pypi-publish.yml
+++ b/.github/workflows/pypi-publish.yml
@@ -10,15 +10,15 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Set up Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: 3.12
 
       - name: Set up Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: 24
 
diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index b26f2ba2..ae120a9a 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -19,10 +19,10 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: ${{ matrix.python-version }}
 
@@ -36,7 +36,7 @@ jobs:
 
       - name: Upload coverage to Codecov
         if: matrix.python-version == '3.12' && matrix.toxenv == 'django42'
-        uses: codecov/codecov-action@v6
+        uses: codecov/codecov-action@57e3a136b779b570ffcdbf80b3bdc90e7fab3de2 # v6.0.0
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           flags: unittests