diff --git a/.github/workflows/flake-checker.yaml b/.github/workflows/flake-checker.yaml
index 27765fe..4568835 100644
--- a/.github/workflows/flake-checker.yaml
+++ b/.github/workflows/flake-checker.yaml
@@ -18,5 +18,5 @@ jobs:
       - uses: actions/checkout@v5
         with:
           fetch-depth: 0
-      - uses: DeterminateSystems/nix-installer-action@v20
+      - uses: DeterminateSystems/nix-installer-action@v21
       - uses: DeterminateSystems/flake-checker-action@v12
\ No newline at end of file