diff --git a/.github/workflows/local_only.yml b/.github/workflows/local_only.yml
index 2449cb3..93437e9 100644
--- a/.github/workflows/local_only.yml
+++ b/.github/workflows/local_only.yml
@@ -52,10 +52,10 @@ jobs:
 
         steps:
             - name: "Checkout ${{ github.event.repository }} "
-              uses: actions/checkout@v4
+              uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955  # actions/checkout@v4
 
             - name: "Set up Python ${{ env.PYTHON_VERSION }}"
-              uses: actions/setup-python@v5
+              uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # actions/setup-python@v5
               with:
                   python-version: ${{ env.PYTHON_VERSION }}
 
diff --git a/.github/workflows/mkdocs_main.yml b/.github/workflows/mkdocs_main.yml
index 4dc2207..b206118 100644
--- a/.github/workflows/mkdocs_main.yml
+++ b/.github/workflows/mkdocs_main.yml
@@ -10,12 +10,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744  # actions/checkout@v3
       with:
         fetch-depth: 0
 
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@7f4fc3e22c37d6ff65e88745f38bd3157c663f7c  # actions/setup-python@v4
       with:
         python-version: 3.8
 
diff --git a/.github/workflows/mkdocs_release.yml b/.github/workflows/mkdocs_release.yml
index cf44343..4542661 100644
--- a/.github/workflows/mkdocs_release.yml
+++ b/.github/workflows/mkdocs_release.yml
@@ -10,12 +10,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744  # actions/checkout@v3
       with:
         fetch-depth: 0
 
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@7f4fc3e22c37d6ff65e88745f38bd3157c663f7c  # actions/setup-python@v4
       with:
         python-version: 3.8