diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index eab7aef..444abda 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -24,7 +24,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v6
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       with:
         persist-credentials: false
 
diff --git a/.github/workflows/monorepo-release.yml b/.github/workflows/monorepo-release.yml
index 1de50af..ec20c06 100644
--- a/.github/workflows/monorepo-release.yml
+++ b/.github/workflows/monorepo-release.yml
@@ -29,7 +29,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0
           persist-credentials: true
diff --git a/.github/workflows/python-code-quality.yml b/.github/workflows/python-code-quality.yml
index 6263ac3..c122be1 100644
--- a/.github/workflows/python-code-quality.yml
+++ b/.github/workflows/python-code-quality.yml
@@ -19,7 +19,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/python-docker-build.yml b/.github/workflows/python-docker-build.yml
index 919e8c3..fc77698 100644
--- a/.github/workflows/python-docker-build.yml
+++ b/.github/workflows/python-docker-build.yml
@@ -22,7 +22,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0
           persist-credentials: false
@@ -63,7 +63,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/python-docs.yml b/.github/workflows/python-docs.yml
index 4992552..94e006e 100644
--- a/.github/workflows/python-docs.yml
+++ b/.github/workflows/python-docs.yml
@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/python-package-build.yml b/.github/workflows/python-package-build.yml
index 06687ef..aede2af 100644
--- a/.github/workflows/python-package-build.yml
+++ b/.github/workflows/python-package-build.yml
@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0
           persist-credentials: false
diff --git a/.github/workflows/python-release.yml b/.github/workflows/python-release.yml
index 84c3dee..eef48e2 100644
--- a/.github/workflows/python-release.yml
+++ b/.github/workflows/python-release.yml
@@ -19,7 +19,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0
           persist-credentials: true
diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index c08caed..3324d61 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -19,7 +19,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false