diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 08b2f17..45305a5 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -41,13 +41,13 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
         with:
           fetch-depth: 0
 
       - name: Setup Python (used for analysis runtime / import resolution)
         if: matrix.language == 'python'
-        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1  # v6
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1  # v6.3.0
         with:
           python-version: '3.12'  # match the project's CI target (CLAUDE.md); avoid floating 3.x
 
diff --git a/.github/workflows/devskim.yml b/.github/workflows/devskim.yml
index 3fe6520..1b3a73d 100644
--- a/.github/workflows/devskim.yml
+++ b/.github/workflows/devskim.yml
@@ -29,11 +29,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v6
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
 
       # Optional: set up Python & install deps so DevSkim understands imports
       - name: Set up Python
-        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1  # v6
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1  # v6.3.0
         with:
           python-version: "3.12"
           cache: "pip"
diff --git a/.github/workflows/fortify.yml b/.github/workflows/fortify.yml
index 4cfb606..d87b748 100644
--- a/.github/workflows/fortify.yml
+++ b/.github/workflows/fortify.yml
@@ -72,7 +72,7 @@ jobs:
 
     steps:
       - name: Check Out Source Code
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v6
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
 
       - name: Run Fortify Scan
         # Pinned to the v3 release commit (supply-chain hardening: a floating
diff --git a/.github/workflows/semgrep.yml b/.github/workflows/semgrep.yml
index 1791979..1889a53 100644
--- a/.github/workflows/semgrep.yml
+++ b/.github/workflows/semgrep.yml
@@ -32,7 +32,7 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python
-        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1  # v6
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1  # v6.3.0
         with:
           python-version: '3.12'