diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index 3d7a938d0..5af7d3627 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
         with:
           fetch-depth: 0 # Fetch all history for all branches and tags
 
diff --git a/.github/workflows/python-test.yml b/.github/workflows/python-test.yml
index 0e51c6de1..f9413fc76 100644
--- a/.github/workflows/python-test.yml
+++ b/.github/workflows/python-test.yml
@@ -14,7 +14,7 @@ jobs:
         python-version: ['3.9', '3.10', '3.11', '3.12']
 
     steps:
-      - uses: actions/checkout@v4 # Updated to the latest version
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7 # Updated to the latest version
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4 # Updated to the latest version
         with:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 6f5df3605..ed18de573 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -19,7 +19,7 @@ jobs:
       id-token: write
     
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
       with:
         fetch-depth: 0
         token: ${{ secrets.GITHUB_TOKEN }}