diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 199c562..8341d74 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
-      - uses: cachix/install-nix-action@v20
+      - uses: cachix/install-nix-action@v21
         with:
           github_access_token: ${{ secrets.GITHUB_TOKEN }}
       - run: nix flake check --show-trace