diff --git a/.github/workflows/build_and_deploy_docu.yml b/.github/workflows/build_and_deploy_docu.yml
index 914dd40..03f5866 100644
--- a/.github/workflows/build_and_deploy_docu.yml
+++ b/.github/workflows/build_and_deploy_docu.yml
@@ -16,9 +16,9 @@ jobs:
     name: Build and deploy Docu
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
 
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@65d7f2d534ac1bc67fcd62888c5f4f3d2cb2b236 # v4.7.1
         with:
           python-version: '3.10'
 
diff --git a/.github/workflows/code_coverage.yml b/.github/workflows/code_coverage.yml
index e655d00..2ad2b66 100644
--- a/.github/workflows/code_coverage.yml
+++ b/.github/workflows/code_coverage.yml
@@ -18,9 +18,9 @@ jobs:
       name: Code Coverage
       runs-on: ubuntu-22.04
       steps:
-        - uses: actions/checkout@v3
+        - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
 
-        - uses: actions/setup-python@v4
+        - uses: actions/setup-python@65d7f2d534ac1bc67fcd62888c5f4f3d2cb2b236 # v4.7.1
           with:
             python-version: '3.10'
 
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 1b990fe..de318a5 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -20,9 +20,9 @@ jobs:
     name: Lint Check
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
 
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@65d7f2d534ac1bc67fcd62888c5f4f3d2cb2b236 # v4.7.1
         with:
           python-version: '3.10'
 
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 20b07eb..c15f9bc 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -18,9 +18,9 @@ jobs:
     name: Unit Tests
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
 
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@65d7f2d534ac1bc67fcd62888c5f4f3d2cb2b236 # v4.7.1
         with:
           python-version: '3.10'
 
@@ -34,7 +34,7 @@ jobs:
       - name: Run Unit Tests
         run: python3 -m xmlrunner discover -s tests/unit_test -v -o tmp/build/unittest-reports
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@a8a3f3ad30e3422c9c7b888a15615d19a852ae32 # v3.1.3
         with:
           name: Unit Test results
           path: tmp/build/unittest-reports/*.xml
@@ -43,9 +43,9 @@ jobs:
     name: Integration Tests
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
 
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@65d7f2d534ac1bc67fcd62888c5f4f3d2cb2b236 # v4.7.1
         with:
           python-version: '3.10'
 
@@ -59,7 +59,7 @@ jobs:
       - name: Run Unit Tests
         run: python3 -m xmlrunner discover -s tests/integration_tests -v -o tmp/build/integrationtest-reports
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@a8a3f3ad30e3422c9c7b888a15615d19a852ae32 # v3.1.3
         with:
           name: Integration Test results
           path: tmp/build/integrationtest-reports/*.xml