diff --git a/.github/workflows/tag.yaml b/.github/workflows/tag.yaml
index 9370c864d..961f3050a 100644
--- a/.github/workflows/tag.yaml
+++ b/.github/workflows/tag.yaml
@@ -46,6 +46,10 @@ jobs:
         working-directory: tools/syn2mas
         run: npm version "${{ inputs.version }}" --no-git-tag-version
 
+      - name: Re-format package.json with biome
+        working-directory: tools/syn2mas
+        run: npx biome format --write package.json
+
       - name: Commit and tag using the GitHub API
         uses: actions/github-script@v7.0.1
         id: commit