diff --git a/.github/workflows/review.yml b/.github/workflows/review.yml
index d4e86e9..b1b48b2 100644
--- a/.github/workflows/review.yml
+++ b/.github/workflows/review.yml
@@ -23,7 +23,8 @@ jobs:
       - run: npm ci
       - uses: anthropics/claude-code-action@d70510b174a1244958df0b03166a54912811f3e6 # v1
         with:
-          anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+          # Subscription token: the API key's credit did not cover the Claude Code client ("Credit balance is too low").
+          claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
           # Without this the action asks for an OIDC token, which needs id-token: write.
           github_token: ${{ secrets.GITHUB_TOKEN }}
           prompt: |