diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index ccd9b5d..0f2df0c 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
 
       - name: Setup Python
         uses: actions/setup-python@v6
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index f73d967..0e8a7d0 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -30,7 +30,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v6
+      uses: actions/checkout@v6.0.2
       with:
         # We must fetch at least the immediate parents so that if this is
         # a pull request then we can checkout the head.