diff --git a/.github/workflows/update-pdf-renderer.yml b/.github/workflows/update-pdf-renderer.yml
index f44d1eed..4746b3b6 100644
--- a/.github/workflows/update-pdf-renderer.yml
+++ b/.github/workflows/update-pdf-renderer.yml
@@ -51,7 +51,10 @@ jobs:
         if: steps.check.outputs.changed == 'true'
         env:
           GH_TOKEN: ${{ steps.app-token.outputs.token }}
-        run: echo "user-id=$(gh api "/users/${{ steps.app-token.outputs.app-slug }}[bot]" --jq .id)" >> "$GITHUB_OUTPUT"
+          APP_SLUG: ${{ steps.app-token.outputs.app-slug }}
+        run: |
+          user_id="$(gh api "/users/${APP_SLUG}[bot]" --jq .id)"
+          echo "user-id=${user_id}" >> "$GITHUB_OUTPUT"
 
       - name: Create Pull Request
         if: steps.check.outputs.changed == 'true'