Just put this file in your next.js repository inside .github/workflows/ and get PRs with latest version of Next every 8h (if there was newer)

update-dependencies.yml

name: Update Dependencies

on:
  schedule:
    # Runs every 8 hours (at 00:00, 08:00, and 16:00 UTC)
    - cron: "0 */8 * * *"
  workflow_dispatch: # Allows manual trigger

permissions:
  contents: write
  pull-requests: write

jobs:
  update-dependencies:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Setup pnpm
        uses: pnpm/action-setup@v4
        with:
          version: latest

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: 24
          cache: "pnpm"

      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      - name: Run Next.js upgrade codemod
        run: npx @next/codemod@canary upgrade latest

      - name: Check for changes
        id: check_changes
        run: |
          git diff --quiet pnpm-lock.yaml package.json apps/marketing/package.json packages/ui/package.json packages/typescript-config/package.json || echo "has_changes=true" >> $GITHUB_OUTPUT

      - name: Install updated dependencies
        if: steps.check_changes.outputs.has_changes == 'true'
        run: pnpm install

      - name: Run checks
        if: steps.check_changes.outputs.has_changes == 'true'
        run: |
          pnpm dlx ultracite fix
          pnpm check

      - name: Create Pull Request
        if: steps.check_changes.outputs.has_changes == 'true'
        uses: peter-evans/create-pull-request@v6
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          commit-message: "chore: update dependencies to latest versions"
          branch: chore/update-dependencies
          delete-branch: true
          title: "chore: update dependencies to latest versions"
          body: |
            ## 📦 Dependency Updates

            This PR updates dependencies to their latest versions using `@next/codemod upgrade latest`.

            ### ✅ Checks Performed
            - TypeScript compilation
            - Linting with Ultracite/Biome
            - Code formatting

            ---
            *This PR was automatically generated by the Update Dependencies workflow.*
          labels: |
            dependencies
            automated
          assignees: ${{ github.repository_owner }}

      - name: No updates found
        if: steps.check_changes.outputs.has_changes != 'true'
        run: echo "✅ All dependencies are up to date!"