diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3d3bc89..06288a4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
       NIX_STDENV: ${{ matrix.cxx }}
     steps:
     - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@v24
+    - uses: cachix/install-nix-action@v27
       with:
         nix_path: nixpkgs=channel:nixos-unstable
     - run: nix flake check --print-build-logs