diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 153d10b..e6fa563 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,5 +10,5 @@ jobs:
         os: [ubuntu-latest, macos-latest]
     steps:
     - uses: actions/checkout@v3
-    - uses: cachix/install-nix-action@v18
+    - uses: cachix/install-nix-action@v20
     - run: nix build --extra-experimental-features nix-command -L -f . -I nixpkgs=https://github.com/NixOS/nixpkgs/archive/nixpkgs-unstable.tar.gz --show-trace