diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 2c301a86..eb37549c 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
-      - uses: j178/prek-action@v2
+      - uses: j178/prek-action@cbc2f23eb5539cf20d82d1aabd0d0ecbcc56f4e3 # v2.0.2
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e0ee2f20..dee49eca 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -52,14 +52,14 @@ jobs:
             python: "3.14"
             experimental: false
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
     - name: Set up Python ${{ matrix.python }}
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
       if: "!endsWith(matrix.python, '-dev')"
       with:
         python-version: ${{ matrix.python }}
     - name: Set up Python ${{ matrix.python }} using deadsnakes
-      uses: deadsnakes/action@v3.2.0
+      uses: deadsnakes/action@e640ac8743173a67cca4d7d77cd837e514bf98e8 # v3.2.0
       if: "endsWith(matrix.python, '-dev')"
       with:
         python-version: ${{ matrix.python }}
diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
index 9199c96c..273d8eac 100644
--- a/.github/workflows/mypy.yml
+++ b/.github/workflows/mypy.yml
@@ -14,8 +14,8 @@ jobs:
     name: Check code with mypy
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
-      - uses: actions/setup-python@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           cache: "pip"
           cache-dependency-path: "pyproject.toml"
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 0313f277..36899633 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -15,9 +15,9 @@ jobs:
       id-token: write
 
     steps:
-    - 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.x'
         cache: pip
@@ -30,4 +30,4 @@ jobs:
         python -m build
     - name: Publish distribution 📦 to PyPI
       if: startsWith(github.event.ref, 'refs/tags') || github.event_name == 'release'
-      uses: pypa/gh-action-pypi-publish@release/v1
+      uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b # v1.14.0