diff --git a/.github/workflows/build-wheel.yml b/.github/workflows/build-wheel.yml
index 2bb066480..db13d48d2 100644
--- a/.github/workflows/build-wheel.yml
+++ b/.github/workflows/build-wheel.yml
@@ -8,9 +8,9 @@ jobs:
     name: Build wheel
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
       with:
         python-version: '3.11'
     - name: Install dependencies
@@ -19,6 +19,6 @@ jobs:
         pip install wheel
     - name: Build bdist_wheel
       run: python setup.py bdist_wheel
-    - uses: actions/upload-artifact@v4
+    - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
       with:
         path: dist/*.whl
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 06188b8f0..b411ebd75 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -12,9 +12,9 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
       with:
         python-version: "3.11"
     - name: Install dependencies
diff --git a/.github/workflows/sphinx2ghpages.yml b/.github/workflows/sphinx2ghpages.yml
index 7c7536295..5494752b1 100644
--- a/.github/workflows/sphinx2ghpages.yml
+++ b/.github/workflows/sphinx2ghpages.yml
@@ -17,10 +17,10 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
       with:
         python-version: "3.11"
 
diff --git a/.github/workflows/unittests.yml b/.github/workflows/unittests.yml
index ead32edba..f709af90b 100644
--- a/.github/workflows/unittests.yml
+++ b/.github/workflows/unittests.yml
@@ -34,9 +34,9 @@ jobs:
             python-version: "3.11"
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies