diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f1139602..f1cc0768 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -19,12 +19,12 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
       with:
         submodules: recursive
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405  # v6.2.0
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -46,7 +46,7 @@ jobs:
         bash scripts/cicd/run_vader_tests_direct.sh
 
     - name: Upload test results
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
       if: always()
       with:
         name: test-results-linux-${{ matrix.python-version }}
@@ -56,7 +56,7 @@ jobs:
           results/
 
     - name: Upload coverage reports
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@57e3a136b779b570ffcdbf80b3bdc90e7fab3de2  # v6.0.0
       with:
         file: ./coverage.xml
         flags: linux-python-${{ matrix.python-version }}
@@ -71,12 +71,12 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
       with:
         submodules: recursive
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405  # v6.2.0
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -107,7 +107,7 @@ jobs:
         bash scripts/cicd/run_vader_tests_direct.sh
 
     - name: Upload test results
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
       if: always()
       with:
         name: test-results-macos-${{ matrix.python-version }}
@@ -117,7 +117,7 @@ jobs:
           results/
 
     - name: Upload coverage reports
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@57e3a136b779b570ffcdbf80b3bdc90e7fab3de2  # v6.0.0
       with:
         file: ./coverage.xml
         flags: macos-python-${{ matrix.python-version }}
@@ -132,12 +132,12 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
       with:
         submodules: recursive
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405  # v6.2.0
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -203,7 +203,7 @@ jobs:
         pwsh scripts/cicd/run_vader_tests_windows.ps1
 
     - name: Upload test results
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
       if: always()
       with:
         name: test-results-windows-${{ matrix.python-version }}
@@ -213,7 +213,7 @@ jobs:
           results/
 
     - name: Upload coverage reports
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@57e3a136b779b570ffcdbf80b3bdc90e7fab3de2  # v6.0.0
       with:
         file: ./coverage.xml
         flags: windows-python-${{ matrix.python-version }}
@@ -226,12 +226,12 @@ jobs:
     
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
       with:
         submodules: recursive
 
     - name: Download all test results
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c  # v8.0.1
       with:
         path: test-results-artifacts
         pattern: test-results-*
@@ -249,7 +249,7 @@ jobs:
       continue-on-error: true
 
     - name: Post PR comment
-      uses: thollander/actions-comment-pull-request@v3
+      uses: thollander/actions-comment-pull-request@24bffb9b452ba05a4f3f77933840a6a841d1b32b  # v3.0.1
       if: always() && github.event_name == 'pull_request'
       with:
         file-path: pr-summary.md