diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index b045ff2..0873a6e 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -18,6 +18,6 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v26
+      - uses: cachix/install-nix-action@V27
       - run: tests/run-tests.sh