diff --git a/.github/workflows/host_ci.yml b/.github/workflows/host_ci.yml
index 9551d97..5b03455 100644
--- a/.github/workflows/host_ci.yml
+++ b/.github/workflows/host_ci.yml
@@ -17,7 +17,7 @@ jobs:
         uses: actions/checkout@v5
 
       - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v20
+        uses: DeterminateSystems/nix-installer-action@v21
 
       - run: |
           : nix flake check