diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index e3e4c8eb..9383944a 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: cachix/install-nix-action@0b0e072294b088b73964f1d72dfdac0951439dbd # v31.8.4
+      - uses: cachix/install-nix-action@13d8dd58da0234aa297dedd986986ccb8e7f3e24 # v31.11.1
         with:
           github_access_token: ${{ secrets.GITHUB_TOKEN }}
       - name: Update flake