diff --git a/.github/workflows/claude-code-review.yml b/.github/workflows/claude-code-review.yml
index eda99cc..2b5987b 100644
--- a/.github/workflows/claude-code-review.yml
+++ b/.github/workflows/claude-code-review.yml
@@ -33,7 +33,7 @@ jobs:
 
       - name: Run Claude Code Review
         id: claude-review
-        uses: anthropics/claude-code-action@v1
+        uses: anthropics/claude-code-action@a7e4c51380c42dd89b127f5e5f9be7b54020bc6b # v1
         with:
           claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
           prompt: |
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index 7e538c7..43b04db 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@a7e4c51380c42dd89b127f5e5f9be7b54020bc6b # v1
         with:
           claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}