diff --git a/.github/workflows/0-welcome.yml b/.github/workflows/0-welcome.yml
index 4c3c7b0..996fe43 100644
--- a/.github/workflows/0-welcome.yml
+++ b/.github/workflows/0-welcome.yml
@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
 
       # In README.md, switch step 0 for step 1.
       - name: Update to step 1
diff --git a/.github/workflows/1-enable-codeql.yml b/.github/workflows/1-enable-codeql.yml
index e8d6487..8295102 100644
--- a/.github/workflows/1-enable-codeql.yml
+++ b/.github/workflows/1-enable-codeql.yml
@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
       - id: get_step
         run: |
           echo "current_step=$(cat ./.github/steps/-step.txt)" >> $GITHUB_OUTPUT
@@ -52,7 +52,7 @@ jobs:
     steps:
       # We'll need to check out the repository so that we can edit the README.
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
         with:
           fetch-depth: 0 # Let's get all the branches.
 
diff --git a/.github/workflows/2-review-and-triage-codeql-alerts.yml b/.github/workflows/2-review-and-triage-codeql-alerts.yml
index 530d6e7..71e8e26 100644
--- a/.github/workflows/2-review-and-triage-codeql-alerts.yml
+++ b/.github/workflows/2-review-and-triage-codeql-alerts.yml
@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
       - id: get_step
         run: |
           echo "current_step=$(cat ./.github/steps/-step.txt)" >> $GITHUB_OUTPUT
@@ -37,7 +37,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/3-fix-security-vulnerabilities.yml b/.github/workflows/3-fix-security-vulnerabilities.yml
index 1379da9..6c34881 100644
--- a/.github/workflows/3-fix-security-vulnerabilities.yml
+++ b/.github/workflows/3-fix-security-vulnerabilities.yml
@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
       - id: get_step
         run: |
           echo "current_step=$(cat ./.github/steps/-step.txt)" >> $GITHUB_OUTPUT
@@ -51,7 +51,7 @@ jobs:
     steps:
       # We'll need to check out the repository so that we can edit the README.
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
         with:
           fetch-depth: 0 # Let's get all the branches.
 
diff --git a/.github/workflows/4-prevent-vulnerabilities-in-the-pull-request.yml b/.github/workflows/4-prevent-vulnerabilities-in-the-pull-request.yml
index adafd50..a4d0a81 100644
--- a/.github/workflows/4-prevent-vulnerabilities-in-the-pull-request.yml
+++ b/.github/workflows/4-prevent-vulnerabilities-in-the-pull-request.yml
@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
       - id: get_step
         run: |
           echo "current_step=$(cat ./.github/steps/-step.txt)" >> $GITHUB_OUTPUT
@@ -50,7 +50,7 @@ jobs:
     steps:
       # We'll need to check out the repository so that we can edit the README.
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
         with:
           fetch-depth: 0 # Let's get all the branches.
 
diff --git a/.github/workflows/5-tbd.yml b/.github/workflows/5-tbd.yml
index 4b57b6b..5cc8d4d 100644
--- a/.github/workflows/5-tbd.yml
+++ b/.github/workflows/5-tbd.yml
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
       - id: get_step
         run: |
           echo "current_step=$(cat ./.github/steps/-step.txt)" >> $GITHUB_OUTPUT
@@ -49,7 +49,7 @@ jobs:
     steps:
       # We'll need to check out the repository so that we can edit the README.
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
         with:
           fetch-depth: 0 # Let's get all the branches.