diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 06b4f4d..2c35faa 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,6 +9,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v5.0.0
-      - uses: DeterminateSystems/nix-installer-action@v20
+      - uses: DeterminateSystems/nix-installer-action@v21
       - run: nix build
       - run: nix flake check