diff --git a/.github/workflows/bandit.yml b/.github/workflows/bandit.yml
index 53b310c..14dccba 100644
--- a/.github/workflows/bandit.yml
+++ b/.github/workflows/bandit.yml
@@ -11,8 +11,8 @@ jobs:
   bandit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 # v2
       - name: Run bandit
-        uses: tj-actions/bandit@v5.1
+        uses: tj-actions/bandit@67ccda81837995c1e194e7b010f5ec55e762f204 # v5.1
         with:
           options: "-c bandit.yml -r"
diff --git a/.github/workflows/black.yml b/.github/workflows/black.yml
index 34ade0e..e561c49 100644
--- a/.github/workflows/black.yml
+++ b/.github/workflows/black.yml
@@ -12,5 +12,5 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: psf/black@stable
\ No newline at end of file
+      - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 # v2
+      - uses: psf/black@1b2427a2b785cc4aac97c19bb4b9a0de063f9547 # stable
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d9f58b8..d289c07 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,9 +11,9 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
     - name: Set up Python 3.9
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@65d7f2d534ac1bc67fcd62888c5f4f3d2cb2b236 # v4
       with:
         python-version: "3.9"
     - name: Install dependencies
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 4151ec7..8550875 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -20,18 +20,18 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
+      uses: github/codeql-action/init@094bbe8be86284d004fe1cd9dffcbea6fc3c6c2d # v2
       with:
         languages: ${{ matrix.language }}
 
     # Autobuild attempts to build any compiled languages  (C/C++, C#, Go, 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@v2
+      uses: github/codeql-action/autobuild@094bbe8be86284d004fe1cd9dffcbea6fc3c6c2d # v2
 
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
@@ -44,6 +44,6 @@ jobs:
     #     ./location_of_script_within_repo/buildscript.sh
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2
+      uses: github/codeql-action/analyze@094bbe8be86284d004fe1cd9dffcbea6fc3c6c2d # v2
       with:
         category: "/language:${{matrix.language}}"
diff --git a/.github/workflows/pylint.yml b/.github/workflows/pylint.yml
index 20a49eb..22cc543 100644
--- a/.github/workflows/pylint.yml
+++ b/.github/workflows/pylint.yml
@@ -15,9 +15,9 @@ jobs:
       matrix:
         python-version: ["3.9"]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@3542bca2639a428e1796aaa6a2ffef0c0f575566 # v3
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
@@ -26,4 +26,4 @@ jobs:
         pip install pylint
     - name: Analysing the code with pylint
       run: |
-        pylint $(git ls-files '*.py')
\ No newline at end of file
+        pylint $(git ls-files '*.py')
diff --git a/.github/workflows/python-publish.yml b/.github/workflows/python-publish.yml
index 92f77b7..11d729c 100644
--- a/.github/workflows/python-publish.yml
+++ b/.github/workflows/python-publish.yml
@@ -15,9 +15,9 @@ jobs:
        # see: https://docs.pypi.org/trusted-publishers/
        id-token: write
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
     - name: Set up Python
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@3542bca2639a428e1796aaa6a2ffef0c0f575566 # v3
       with:
         python-version: '3.9'
     - name: Install dependencies