diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index f27678b2e..58fa8fca5 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml
@@ -18,7 +18,6 @@ jobs:
         uses: actions/checkout@v4
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
-          ref: ${{ github.head_ref || github.ref }}
 
       - name: Setup Bun
         uses: ./.github/actions/setup-bun
@@ -28,3 +27,5 @@ jobs:
           ./script/format.ts
         env:
           CI: true
+          GITHUB_HEAD_REF: ${{ github.head_ref }}
+          GITHUB_REF_NAME: ${{ github.ref_name }}
diff --git a/script/format.ts b/script/format.ts
index f5a54a57f..aa0e82534 100755
--- a/script/format.ts
+++ b/script/format.ts
@@ -5,9 +5,10 @@ import { $ } from "bun"
 await $`bun run prettier --ignore-unknown --write .`
 
 if (process.env["CI"] && (await $`git status --porcelain`.text())) {
+  const branch = process.env["GITHUB_HEAD_REF"] || process.env["GITHUB_REF_NAME"]
   await $`git config --local user.email "action@github.com"`
   await $`git config --local user.name "GitHub Action"`
   await $`git add -A`
   await $`git commit -m "chore: format code"`
-  await $`git push --no-verify`
+  await $`git push origin HEAD:${branch} --no-verify`
 }