diff --git a/.github/workflows/ci_workflows.yml b/.github/workflows/ci_workflows.yml
index d88f2e2..93310df 100644
--- a/.github/workflows/ci_workflows.yml
+++ b/.github/workflows/ci_workflows.yml
@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Check base branch
-      uses: actions/github-script@v7
+      uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea  # v7.0.1
       if: github.event_name == 'pull_request'
       with:
         script: |
@@ -40,11 +40,11 @@ jobs:
     needs: initial_check
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938  # v4.2.0
       with:
         fetch-depth: 0
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3  # v5.2.0
       with:
         python-version: '3.x'
     - name: Lint with flake8
@@ -66,11 +66,11 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938  # v4.2.0
       with:
         fetch-depth: 0
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3  # v5.2.0
       with:
         python-version: '3.11'
     - name: Install and build
@@ -85,11 +85,11 @@ jobs:
     needs: initial_check
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938  # v4.2.0
       with:
         fetch-depth: 0
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3  # v5.2.0
       with:
         python-version: '3.x'
     - name: Install and build
@@ -109,9 +109,9 @@ jobs:
     if: ${{ github.event_name == 'schedule' }}
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938  # v4.2.0
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3  # v5.2.0
       with:
         python-version: '3.x'
     - name: Install and build
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index fae9e15..78ed24c 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -37,11 +37,11 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938  # v4.2.0
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v3
+      uses: github/codeql-action/init@5618c9fc1e675841ca52c1c6b1304f5255a905a0  # codeql-bundle-v2.19.0
       with:
         languages: ${{ matrix.language }}
         # If you wish to specify custom queries, you can do so here or in a config file.
@@ -52,7 +52,7 @@ jobs:
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
     - name: Autobuild
-      uses: github/codeql-action/autobuild@v3
+      uses: github/codeql-action/autobuild@5618c9fc1e675841ca52c1c6b1304f5255a905a0  # codeql-bundle-v2.19.0
 
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 https://git.io/JvXDl
@@ -66,4 +66,4 @@ jobs:
     #   make release
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v3
+      uses: github/codeql-action/analyze@5618c9fc1e675841ca52c1c6b1304f5255a905a0  # codeql-bundle-v2.19.0
diff --git a/.github/workflows/open_actions.yml b/.github/workflows/open_actions.yml
index f4c0040..12b795d 100644
--- a/.github/workflows/open_actions.yml
+++ b/.github/workflows/open_actions.yml
@@ -13,12 +13,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Label PR
-      uses: actions/labeler@v5
+      uses: actions/labeler@8558fd74291d67161a8a78ce36a881fa63b766a9  # v5.0.0
       if: github.event_name == 'pull_request_target' || github.event_name == 'pull_request'
       with:
         repo-token: "${{ secrets.GITHUB_TOKEN }}"
     - name: 'Comment Draft PR'
-      uses: actions/github-script@v7
+      uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea  # v7.0.1
       if: github.event.pull_request.draft == true
       with:
         github-token: ${{ secrets.GITHUB_TOKEN }}
@@ -30,6 +30,6 @@ jobs:
             body: '👋 Thank you for your draft pull request! Do you know that you can use `[ci skip]` or `[skip ci]` in your commit messages to skip running continuous integration tests until you are ready?'
           })
     #- name: Special comment
-    #  uses: pllim/action-special_pr_comment@main
+    #  uses: pllim/action-special_pr_comment@5126c189c02418a55448480b28efd1a00af48d7b  # 0.2
     #  with:
     #    GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/predeps_workflow.yml b/.github/workflows/predeps_workflow.yml
index 5310a99..25b0664 100644
--- a/.github/workflows/predeps_workflow.yml
+++ b/.github/workflows/predeps_workflow.yml
@@ -19,11 +19,11 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938  # v4.2.0
       with:
         fetch-depth: 0
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3  # v5.2.0
       with:
         python-version: '3.11'
     - name: Install and build
diff --git a/.github/workflows/publish-to-pypi.yml b/.github/workflows/publish-to-pypi.yml
index 1733e7c..d047b2e 100644
--- a/.github/workflows/publish-to-pypi.yml
+++ b/.github/workflows/publish-to-pypi.yml
@@ -21,11 +21,11 @@ jobs:
       id-token: write  # IMPORTANT: mandatory for trusted publishing
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938  # v4.2.0
       with:
         fetch-depth: 0
 
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3  # v5.2.0
       with:
         python-version: '3.x'
 
@@ -50,4 +50,4 @@ jobs:
 
     - name: Publish distribution 📦 to PyPI
       if: github.event_name == 'release'
-      uses: pypa/gh-action-pypi-publish@release/v1
+      uses: pypa/gh-action-pypi-publish@897895f1e160c830e369f9779632ebc134688e1b  # v1.10.2