diff --git a/.github/workflows/claude-code-review.yml b/.github/workflows/claude-code-review.yml
index ac0ba57..e20f53e 100644
--- a/.github/workflows/claude-code-review.yml
+++ b/.github/workflows/claude-code-review.yml
@@ -23,7 +23,7 @@ jobs:
 
       - name: Run Claude Code Review
         id: claude-review
-        uses: anthropics/claude-code-action@v1
+        uses: anthropics/claude-code-action@0fe28cdb64e23015219b0e478100b7105fd7dfa1 # v1.0.167
         with:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
           prompt: |
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index fcbb1b5..8db183a 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -32,7 +32,7 @@ jobs:
 
       - name: Run Claude Code
         id: claude
-        uses: anthropics/claude-code-action@v1
+        uses: anthropics/claude-code-action@0fe28cdb64e23015219b0e478100b7105fd7dfa1 # v1.0.167
         with:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}