diff --git a/.github/workflows/treefmt.yml b/.github/workflows/treefmt.yml
index 1b00503..9c7384e 100644
--- a/.github/workflows/treefmt.yml
+++ b/.github/workflows/treefmt.yml
@@ -10,7 +10,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Install nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@V27
         with:
           extra_nix_config: |
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}